On October 14, 2008 (September 16, 2008 in the lunar calendar), the chicken crown returned: the Sino-Russian border issue came to an end. On October 14, 2008, China and Russia held the "China-Russia Border Monument Unveiling Ceremony" on Heixiazi Island, which marked that the border line between China and Russia that lasted more than 4,300 kilometers would be fully determined. The border between China and Russia was finally demarcated. Tarabarov Island (Yinlong Island) and half of the Great Usurinsky Island (Heixiazi Island) returned to China's territory after 79 years. China's new land area is about 174 square kilometers. Heixiazi Island is located at the confluence of the Heilongjiang and Usuri Rivers on the Sino-Russian border, also known as the Fuyuan Delta, covering an area of more than 300 square kilometers. According to the "Supplementary Agreement on the Eastern Section of the Sino-Russian Boundary" signed in 2004, Heixiazi Island is divided into two, and half of the islands near China on the western side are owned by China. This part of the islands is still in an undeveloped natural state and will become "the first place where China sees the sun". Liu Guchang, Chinese ambassador extraordinary and plenipotentiary to the Russian Federation, said that negotiations on the ownership of Heixiazi Island have been at a standstill for decades. It was not until the turn of the century that the two heads of state made a political decision to resolve the issue of Heixiazi Island. After many rounds of negotiations, the two sides finally reached a consensus and decided in principle to divide Heixiazi Island equally. In 2005, the Russian Duma, the Federation Council and the National People's Congress of China successively approved the agreement, thus drawing a conclusion to the final settlement of Heixiazi Island and even the Sino-Russian border issue. General name of Heixiazi Island: Fuyuan Delta, known as Heixiazi Island in Manchu Name: Morin Wuzhu Island (morin horse, ujui head, head), so the Chinese literal translation is "Matou Island". Russian name: Tarabalov Island, Great Ussuri Island Area: 350 square kilometers Geographical location: 48 ° 17 ¡ä to 48 ° 27 ¡ä north latitude, 134 ° 24 ¡ä to 135 ° 05 ¡ä east longitude The first place to see the sun in the motherland Heixiazi Island is also known as Fuyuan Delta (called Great Ussuri Island in Russian £º§à§ã§ä§â§à§Ó§à§Ó§¢§à§Ý§î§ê§à§Û§µ§ã§ã§å§â§Ú§Û§ã§Ü§Ú§Û)£¬ is located in Fuyuan County on the border between China and Russia. It is the first place in China to see the sun. If it is a sunny day, at around 3 o'clock in the middle of the night, the red sun will rise from the river. Heixiazi Island is about 58.85 kilometers long from east to west and 14.01 kilometers wide from north to south. The whole island has an area of 350 square kilometers in dry season and 327 square kilometers in flood season. It is one-third that of Hong Kong, 12 times that of Macau, and 500 times that of Zhenbao Island. It is a little smaller than the land area of Singapore. Heixiazi Island consists of 93 islands and sandbars in the three island systems of Yinlong Island (Tarabarov Island in Russian £º§à§ã§ä§â§à§Ó§à§Ó§´§Ñ§â§Ñ§Ò§Ñ§â§à§Ó)¡¢ Heixiazi Island and Mingyue Island, together with the adjacent waters, totaling 450 square kilometers. The average altitude of the island is about 40 meters, and the terrain is flat and basically undeveloped. It is not an island in the river, but an alluvial delta with an important position. It guards the navigable throat of the Heilongjiang-Ussuri River and faces Khabarovsk (Buri) in Russia across the river. It is under the jurisdiction of Fuyuan County, Heilongjiang Province, in the administrative division of China. But since the Middle East Road incident in 1929, the former Soviet Union (now Russia) has been under the jurisdiction of the island and belongs to Khabarovsk, Russia. The island is located at 48 ° 17 ¡ä to 48 ° 27 ¡ä north latitude and 134 ° 24 ¡ä to 135 ° 05 ¡ä east longitude. It is a self-contained, fully enclosed island surrounded by water on three sides. Natural resources are rich and diverse. The natural resources on Heixiazi Island are rich and diverse. 70% of the area can be used for arable land, mowing fields or pastures, which are basically undeveloped. The island mainly grows willow, elm, poplar, oak and pasture, and the river branches are vertical and horizontal, and the aquatic plants are abundant. The island is inhabited by precious fur beasts and water birds, mainly black storks, black cranes, mandarin ducks, red geese and other wild and rare animals. There are many kinds of fish in Heilongjiang and its tributaries and rivers and lakes, more than in the entire Volga River Basin. The main fish are salmon, sturgeon catfish, carp, crucian carp, silver carp, whitefish, Ao Hua and dozens of other species, which are the only way for salmon to travel. Fuyuan County is therefore called "the hometown of Chinese sturgeon catfish" and "the hometown of Chinese salmon". Gateway position To the east of Heixiazi Island is Khabarovsk, the largest city in the Russian Far East, known as "Boli" in ancient China. Since Khabarovsk is close to Heixiazi Island and is the gateway to Heilongjiang and the Ussuri River, it has an important strategic position. It is also the choke of the sea passage of Heilongjiang. It goes straight down Heilongjiang through Khabarovsk, and can reach Temple Street, cross the Tatar Strait, and then reach Sakhalin Island. At the same time, Khabarovsk is the throat of the Trans-Siberian Railway to Vladivostok. The Russian church on Heixiazi Island Approaching Heixiazi Island Approaching the church on Heixiazi Island Heixiazi Island and Chinese border patrol boats overlook Heixiazi Island The Russian guard post on Heixiazi Island Fuyuan The wetlands of the delta are far away. The current situation of Heixiazi Island is like a wedge nailed into Haba. In other words, Haba is built along the Heilongjiang and Ussuri River around Heixiazi Island. From the city of Haba to Heixiazi Island, just like Harbin from the river to Sun Island, fixed passenger ships make dozens of trips a day and arrive in ten minutes. There are very few Russians living on the island, and they mostly go on vacation on Fridays and return on Sundays. There are also short-term visits to the island to farm and fish. The fish on the island is very thick, and the Chinese who do business in the local area can buy fresh fish caught on the island every day by strolling along the river. It is very cheap. Carp and crucian carp are only 20 rubles per kilogram, which is more than 0.5 kilograms for 3 yuan. Bream flowers are even cheaper, 12 rubles per kilogram, which is only 0.5 kilograms for 2 yuan. Russians who go to the villa for vacation bring chicken thighs, beef, onions and wine and other food. They come to the island to cut wicker and smoke it, and drink it at a carnival. Heixiazi Island is the only way to go to Haba from Jiamusi City and Fuyuan County to Haba. In previous years, when the border trade was hot, people mostly went to Haba from Jiamusi, went to the water for 7 hours, and came back against the water for 8 hours. Tourists and packers are now walking from Fuyuan, and it takes less than an hour to reach Haba by boat. Looking at the island from the boat, it is green and green, and the occasional contiguous villas that are mostly sparse are not very large, and many of them are still wooden. It is not easy to see Russian anglers by the river. Khabarovsk, the political, economic and cultural center of the Far East of the Russian Federation on the east coast of the island, has the longest river street called Red River Street. There is a famous hotel on the street called Red River Hotel. The Russian side has two farms on the island: one is on the south bank of Heilongjiang in the north-central part of the island. There are 15 buildings, mostly five floors, a factory building, a water tower, three large chimneys, four vertical oil tanks, and a club. Another one was built in 1984 in the central and eastern part of Heixiazi Island. It reclaimed 6,074 hectares of arable land and built a 2-6 meter high waterproof embankment of 31.6 kilometers and a road around the island. On Mingyue Island, Russia built Amur Waterway Bureau and Shipyard, 7 two-story buildings, a bungalow, a water tower, a chimney, and there are asphalt roads in the residential area. On the north bank of the Fuyuan Waterway and the Ussuri River confluence, Russia built a 28-meter-high Orthodox church in October 1999, a small heliport nearby, and Russia built two high-voltage power lines on the island. In July 2001, a lock dam was built in the middle of the Yinlong Waterway, and the slope was ripped. Near the village of Novo on the Ussuri River, there is a boat bridge on the island. There are 107 pontoons with a total length of 800 meters. There are fixed piers at both ends of the boat bridge, and cars can be connected at ordinary times. At present, the development situation on Heixiazi Island is uneven, and the eastern part of the island directly divided into Haba is relatively developed. Around the fertile lowlands with an area of 61 square kilometers, a ring-shaped high dam has been built to prevent flooding. The lowlands produce more than 4,000 tons of potatoes every year, 1,500 cattle can be fed in summer, and the annual milk production can reach 1,700 tons. There are 10 farms on the island, several tourist bases for industrial enterprises in the city, and it is reported that there is a floating bridge directly to Haba. In the Western Peninsula, which is assigned to China, there is basically no trace of development. It is all wetlands and lush grass and low trees. At present, the plan to build the railway has been approved, and it is ready to be built on Heixiazi Island. The construction of the airport and the deep-water terminal has also entered the critical stage. When the railway is repaired, the freight to and from Haba will save 500 kilometers of freight and can enter directly. At that time, Fuyuan will become an important fulcrum of the Great Triangle pattern of opening up to the outside world in Nansui (Suifenhe), Beihei (Heihe) and Dongfu (Fuyuan) of Heilongjiang Province. Future Development: A New Starting Point for Economic and Trade Exchanges On the morning of October 14, 2008, China and Russia held the unveiling ceremony of the border pillars in the eastern section of the national border on Heixiazi Island. Related infrastructure construction on Heixiazi Island also began immediately. Heixiazi Island is located in the center of Northeast Asia. If you take the island as the center and draw a circle with a radius of 1800 kilometers, it can cover the northeast of our country, the Russian Far East (including Sakhalin Island and Kamchatka Peninsula), East Siberia, the whole island of Japan, the Korean Peninsula and part of the Mongolian People's Republic. This area is what is known internationally as the Northeast Asian Economic Circle. Fuyuan Delta can become a bridgehead for foreign economic and trade cooperation between our country, Japan, South Korea, Hong Kong, Macao and Taiwan, and South East Asia and the Russian Far East. Fuyuan Delta is not only the closest place in a straight line between our country and the Russian Far East and Japan, but also the closest fulcrum of our country from the North American mainland. The local government has decided to build a port there, and ships can go directly to the sea at that time. Heixiazi Island has excellent transportation conditions. The island is bordered by the Heilongjiang River and the Ussuri River on the left and right. Heilongjiang has excellent conditions for building a port, and can dock 5,000 to 10,000 tons of freighters. It is the best starting point for river-sea combined transportation in Heilongjiang Province. Railways and highways are connected to the Trans-Siberian Railway and the road network of the Russian Far East, becoming a "land bridge" connecting Asia, Europe and Asia and America. Historical changes "chicken crowns" have been away from the mother body for nearly 80 years. China has never recognized Russia's possession of Heixiazi Island. On various versions of Chinese maps over the years, China's border extends to the confluence of the Heilongjiang and the Ussuri River, although China has lost control of Heixiazi Island for many years. From 1411 to 1433, the Ming Dynasty eunuchs also lost their lives, so they led a fleet to Heixiazi Island and the upper reaches of Heilongjiang 10 times. In 1854, the Qing government established the Ussuriango checkpoint in the northeast corner of the island. At this time, the Cossacks had not yet come to the forests and lowlands of the Far East. The records of Chinese residents living on the island dating back to 1901 are that in 1901, there were 15 families living on the island, including Feng Delu, Ge Yunshan, and Defke (Hezhe people). In 1929, the Nationalist government declared war on the Soviet Union. On December 20, 1929, Zhang Xueliang was defeated and sent representatives to sign an armistice with the Soviet Union. The Burley Agreement. In the meantime, the Soviet Union took the opportunity to occupy Heixiazi Island. In 1954, Chinese fishermen could no longer go to the island. On February 23, 1964, China and Russia began negotiations on the ownership of Heixiazi Island. In 1969, Sino-Soviet relations began, and the Soviet Union began to immigrate to the island. During the second negotiation on October 20, 1969, the Zhenbao Island incident broke out, and Sino-Soviet conflicts broke out. The negotiations came to an abrupt end. In July 1986, China and the Soviet Union resumed the third border negotiation. In 1989, during Gorbachev's visit to China, Deng Xiaoping proposed to "end the past and face the future." In May 1991, China and Russia signed the Agreement on the Eastern Section of the Sino-Russian Boundary. In September 1994, China and Russia signed the Agreement on the Western Section of the Sino-Russian Boundary. In 1998, the two sides completed the border demarcation. In July 2001, China and Russia held the fourth negotiation and signed the Sino-Russian Treaty of Good-Neighborliness, Friendship and Cooperation. In principle, they decided to divide Heixiazi Island equally. In October 2004, Putin visited China, and the two sides signed the "Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary". The dust on the border dispute between the two sides was settled. On June 2, 2005, China and Russia exchanged the "Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary". The Sino-Russian boundary demarcation work started. On June 16, 2005, China and Russia each formed a mapping team to conduct joint field mapping operations on the island. In April 2007, the Russian army began to dismantle the facilities on Heixiazi Island. In September 2007, the boundary demarcation of Heixiazi Island between China and Russia was basically completed. In November 2007, the boundary marker of China's Heixiazi Island was erected. On October 14, 2008, 174 square kilometers of land in the west of Heixiazi Island, which was occupied in the former Soviet Union China and Russia held a boundary marker unveiling ceremony in the center of the island, and the demarcation of the border of more than 4,300 kilometers between China and Russia was completed. So far, the final settlement of the Sino-Russian border issue has come to an end. According to the 2004 Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary, China regained sovereignty over half of Heixiazi Island and gained 174 square kilometers of land. The second largest island, Yinlong Island, is located in the northwest of Heixiazi Island, so it belongs to China. Russia retains the eastern half of Great Ussuri Island (Heixiazi Island), including the village of Chumka and the villas of Russian residents.On October 14, 2008 (September 16, 2008 in the lunar calendar), the chicken crown returned: the Sino-Russian border issue came to an end. On October 14, 2008, China and Russia held the "China-Russia Border Monument Unveiling Ceremony" on Heixiazi Island, which marked that the border line between China and Russia that lasted more than 4,300 kilometers would be fully determined. The border between China and Russia was finally demarcated. Tarabarov Island (Yinlong Island) and half of the Great Usurinsky Island (Heixiazi Island) returned to China's territory after 79 years. China's new land area is about 174 square kilometers. Heixiazi Island is located at the confluence of the Heilongjiang and Usuri Rivers on the Sino-Russian border, also known as the Fuyuan Delta, covering an area of more than 300 square kilometers. According to the "Supplementary Agreement on the Eastern Section of the Sino-Russian Boundary" signed in 2004, Heixiazi Island is divided into two, and half of the islands near China on the western side are owned by China. This part of the islands is still in an undeveloped natural state and will become "the first place where China sees the sun". Liu Guchang, Chinese ambassador extraordinary and plenipotentiary to the Russian Federation, said that negotiations on the ownership of Heixiazi Island have been at a standstill for decades. It was not until the turn of the century that the two heads of state made a political decision to resolve the issue of Heixiazi Island. After many rounds of negotiations, the two sides finally reached a consensus and decided in principle to divide Heixiazi Island equally. In 2005, the Russian Duma, the Federation Council and the National People's Congress of China successively approved the agreement, thus drawing a conclusion to the final settlement of Heixiazi Island and even the Sino-Russian border issue. General name of Heixiazi Island: Fuyuan Delta, known as Heixiazi Island in Manchu Name: Morin Wuzhu Island (morin horse, ujui head, head), so the Chinese literal translation is "Matou Island". Russian name: Tarabalov Island, Great Ussuri Island Area: 350 square kilometers Geographical location: 48 ° 17 ¡ä to 48 ° 27 ¡ä north latitude, 134 ° 24 ¡ä to 135 ° 05 ¡ä east longitude The first place to see the sun in the motherland Heixiazi Island is also known as Fuyuan Delta (called Great Ussuri Island in Russian £º§à§ã§ä§â§à§Ó§à§Ó§¢§à§Ý§î§ê§à§Û§µ§ã§ã§å§â§Ú§Û§ã§Ü§Ú§Û)£¬ is located in Fuyuan County on the border between China and Russia. It is the first place in China to see the sun. If it is a sunny day, at around 3 o'clock in the middle of the night, the red sun will rise from the river. Heixiazi Island is about 58.85 kilometers long from east to west and 14.01 kilometers wide from north to south. The whole island has an area of 350 square kilometers in dry season and 327 square kilometers in flood season. It is one-third that of Hong Kong, 12 times that of Macau, and 500 times that of Zhenbao Island. It is a little smaller than the land area of Singapore. Heixiazi Island consists of 93 islands and sandbars in the three island systems of Yinlong Island (Tarabarov Island in Russian £º§à§ã§ä§â§à§Ó§à§Ó§´§Ñ§â§Ñ§Ò§Ñ§â§à§Ó)¡¢ Heixiazi Island and Mingyue Island, together with the adjacent waters, totaling 450 square kilometers. The average altitude of the island is about 40 meters, and the terrain is flat and basically undeveloped. It is not an island in the river, but an alluvial delta with an important position. It guards the navigable throat of the Heilongjiang-Ussuri River and faces Khabarovsk (Buri) in Russia across the river. It is under the jurisdiction of Fuyuan County, Heilongjiang Province, in the administrative division of China. But since the Middle East Road incident in 1929, the former Soviet Union (now Russia) has been under the jurisdiction of the island and belongs to Khabarovsk, Russia. The island is located at 48 ° 17 ¡ä to 48 ° 27 ¡ä north latitude and 134 ° 24 ¡ä to 135 ° 05 ¡ä east longitude. It is a self-contained, fully enclosed island surrounded by water on three sides. Natural resources are rich and diverse. The natural resources on Heixiazi Island are rich and diverse. 70% of the area can be used for arable land, mowing fields or pastures, which are basically undeveloped. The island mainly grows willow, elm, poplar, oak and pasture, and the river branches are vertical and horizontal, and the aquatic plants are abundant. The island is inhabited by precious fur beasts and water birds, mainly black storks, black cranes, mandarin ducks, red geese and other wild and rare animals. There are many kinds of fish in Heilongjiang and its tributaries and rivers and lakes, more than in the entire Volga River Basin. The main fish are salmon, sturgeon catfish, carp, crucian carp, silver carp, whitefish, Ao Hua and dozens of other species, which are the only way for salmon to travel. Fuyuan County is therefore called "the hometown of Chinese sturgeon catfish" and "the hometown of Chinese salmon". Gateway position To the east of Heixiazi Island is Khabarovsk, the largest city in the Russian Far East, known as "Boli" in ancient China. Since Khabarovsk is close to Heixiazi Island and is the gateway to Heilongjiang and the Ussuri River, it has an important strategic position. It is also the choke of the sea passage of Heilongjiang. It goes straight down Heilongjiang through Khabarovsk, and can reach Temple Street, cross the Tatar Strait, and then reach Sakhalin Island. At the same time, Khabarovsk is the throat of the Trans-Siberian Railway to Vladivostok. The Russian church on Heixiazi Island Approaching Heixiazi Island Approaching the church on Heixiazi Island Heixiazi Island and Chinese border patrol boats overlook Heixiazi Island The Russian guard post on Heixiazi Island Fuyuan The wetlands of the delta are far away. The current situation of Heixiazi Island is like a wedge nailed into Haba. In other words, Haba is built along the Heilongjiang and Ussuri River around Heixiazi Island. From the city of Haba to Heixiazi Island, just like Harbin from the river to Sun Island, fixed passenger ships make dozens of trips a day and arrive in ten minutes. There are very few Russians living on the island, and they mostly go on vacation on Fridays and return on Sundays. There are also short-term visits to the island to farm and fish. The fish on the island is very thick, and the Chinese who do business in the local area can buy fresh fish caught on the island every day by strolling along the river. It is very cheap. Carp and crucian carp are only 20 rubles per kilogram, which is more than 0.5 kilograms for 3 yuan. Bream flowers are even cheaper, 12 rubles per kilogram, which is only 0.5 kilograms for 2 yuan. Russians who go to the villa for vacation bring chicken thighs, beef, onions and wine and other food. They come to the island to cut wicker and smoke it, and drink it at a carnival. Heixiazi Island is the only way to go to Haba from Jiamusi City and Fuyuan County to Haba. In previous years, when the border trade was hot, people mostly went to Haba from Jiamusi, went to the water for 7 hours, and came back against the water for 8 hours. Tourists and packers are now walking from Fuyuan, and it takes less than an hour to reach Haba by boat. Looking at the island from the boat, it is green and green, and the occasional contiguous villas that are mostly sparse are not very large, and many of them are still wooden. It is not easy to see Russian anglers by the river. Khabarovsk, the political, economic and cultural center of the Far East of the Russian Federation on the east coast of the island, has the longest river street called Red River Street. There is a famous hotel on the street called Red River Hotel. The Russian side has two farms on the island: one is on the south bank of Heilongjiang in the north-central part of the island. There are 15 buildings, mostly five floors, a factory building, a water tower, three large chimneys, four vertical oil tanks, and a club. Another one was built in 1984 in the central and eastern part of Heixiazi Island. It reclaimed 6,074 hectares of arable land and built a 2-6 meter high waterproof embankment of 31.6 kilometers and a road around the island. On Mingyue Island, Russia built Amur Waterway Bureau and Shipyard, 7 two-story buildings, a bungalow, a water tower, a chimney, and there are asphalt roads in the residential area. On the north bank of the Fuyuan Waterway and the Ussuri River confluence, Russia built a 28-meter-high Orthodox church in October 1999, a small heliport nearby, and Russia built two high-voltage power lines on the island. In July 2001, a lock dam was built in the middle of the Yinlong Waterway, and the slope was ripped. Near the village of Novo on the Ussuri River, there is a boat bridge on the island. There are 107 pontoons with a total length of 800 meters. There are fixed piers at both ends of the boat bridge, and cars can be connected at ordinary times. At present, the development situation on Heixiazi Island is uneven, and the eastern part of the island directly divided into Haba is relatively developed. Around the fertile lowlands with an area of 61 square kilometers, a ring-shaped high dam has been built to prevent flooding. The lowlands produce more than 4,000 tons of potatoes every year, 1,500 cattle can be fed in summer, and the annual milk production can reach 1,700 tons. There are 10 farms on the island, several tourist bases for industrial enterprises in the city, and it is reported that there is a floating bridge directly to Haba. In the Western Peninsula, which is assigned to China, there is basically no trace of development. It is all wetlands and lush grass and low trees. At present, the plan to build the railway has been approved, and it is ready to be built on Heixiazi Island. The construction of the airport and the deep-water terminal has also entered the critical stage. When the railway is repaired, the freight to and from Haba will save 500 kilometers of freight and can enter directly. At that time, Fuyuan will become an important fulcrum of the Great Triangle pattern of opening up to the outside world in Nansui (Suifenhe), Beihei (Heihe) and Dongfu (Fuyuan) of Heilongjiang Province. Future Development: A New Starting Point for Economic and Trade Exchanges On the morning of October 14, 2008, China and Russia held the unveiling ceremony of the border pillars in the eastern section of the national border on Heixiazi Island. Related infrastructure construction on Heixiazi Island also began immediately. Heixiazi Island is located in the center of Northeast Asia. If you take the island as the center and draw a circle with a radius of 1800 kilometers, it can cover the northeast of our country, the Russian Far East (including Sakhalin Island and Kamchatka Peninsula), East Siberia, the whole island of Japan, the Korean Peninsula and part of the Mongolian People's Republic. This area is what is known internationally as the Northeast Asian Economic Circle. Fuyuan Delta can become a bridgehead for foreign economic and trade cooperation between our country, Japan, South Korea, Hong Kong, Macao and Taiwan, and South East Asia and the Russian Far East. Fuyuan Delta is not only the closest place in a straight line between our country and the Russian Far East and Japan, but also the closest fulcrum of our country from the North American mainland. The local government has decided to build a port there, and ships can go directly to the sea at that time. Heixiazi Island has excellent transportation conditions. The island is bordered by the Heilongjiang River and the Ussuri River on the left and right. Heilongjiang has excellent conditions for building a port, and can dock 5,000 to 10,000 tons of freighters. It is the best starting point for river-sea combined transportation in Heilongjiang Province. Railways and highways are connected to the Trans-Siberian Railway and the road network of the Russian Far East, becoming a "land bridge" connecting Asia, Europe and Asia and America. Historical changes "chicken crowns" have been away from the mother body for nearly 80 years. China has never recognized Russia's possession of Heixiazi Island. On various versions of Chinese maps over the years, China's border extends to the confluence of the Heilongjiang and the Ussuri River, although China has lost control of Heixiazi Island for many years. From 1411 to 1433, the Ming Dynasty eunuchs also lost their lives, so they led a fleet to Heixiazi Island and the upper reaches of Heilongjiang 10 times. In 1854, the Qing government established the Ussuriango checkpoint in the northeast corner of the island. At this time, the Cossacks had not yet come to the forests and lowlands of the Far East. The records of Chinese residents living on the island dating back to 1901 are that in 1901, there were 15 families living on the island, including Feng Delu, Ge Yunshan, and Defke (Hezhe people). In 1929, the Nationalist government declared war on the Soviet Union. On December 20, 1929, Zhang Xueliang was defeated and sent representatives to sign an armistice with the Soviet Union. The Burley Agreement. In the meantime, the Soviet Union took the opportunity to occupy Heixiazi Island. In 1954, Chinese fishermen could no longer go to the island. On February 23, 1964, China and Russia began negotiations on the ownership of Heixiazi Island. In 1969, Sino-Soviet relations began, and the Soviet Union began to immigrate to the island. During the second negotiation on October 20, 1969, the Zhenbao Island incident broke out, and Sino-Soviet conflicts broke out. The negotiations came to an abrupt end. In July 1986, China and the Soviet Union resumed the third border negotiation. In 1989, during Gorbachev's visit to China, Deng Xiaoping proposed to "end the past and face the future." In May 1991, China and Russia signed the Agreement on the Eastern Section of the Sino-Russian Boundary. In September 1994, China and Russia signed the Agreement on the Western Section of the Sino-Russian Boundary. In 1998, the two sides completed the border demarcation. In July 2001, China and Russia held the fourth negotiation and signed the Sino-Russian Treaty of Good-Neighborliness, Friendship and Cooperation. In principle, they decided to divide Heixiazi Island equally. In October 2004, Putin visited China, and the two sides signed the "Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary". The dust on the border dispute between the two sides was settled. On June 2, 2005, China and Russia exchanged the "Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary". The Sino-Russian boundary demarcation work started. On June 16, 2005, China and Russia each formed a mapping team to conduct joint field mapping operations on the island. In April 2007, the Russian army began to dismantle the facilities on Heixiazi Island. In September 2007, the boundary demarcation of Heixiazi Island between China and Russia was basically completed. In November 2007, the boundary marker of China's Heixiazi Island was erected. On October 14, 2008, 174 square kilometers of land in the west of Heixiazi Island, which was occupied in the former Soviet Union China and Russia held a boundary marker unveiling ceremony in the center of the island, and the demarcation of the border of more than 4,300 kilometers between China and Russia was completed. So far, the final settlement of the Sino-Russian border issue has come to an end. According to the 2004 Supplementary Agreement between the People's Republic of China and the Russian Federation on the Eastern Section of the Sino-Russian Boundary, China regained sovereignty over half of Heixiazi Island and gained 174 square kilometers of land. The second largest island, Yinlong Island, is located in the northwest of Heixiazi Island, so it belongs to China. Russia retains the eastern half of Great Ussuri Island (Heixiazi Island), including the village of Chumka and the villas of Russian residents.