On March 20, 2016 (February 12, 2016 lunar calendar), Obama visited Cuba. Obama will visit Cuba to break the 88-year standoff between the US and Cuban heads of state. A Cuban applauded as Obama's motorcade passed by. Posters on the streets of Havana, the capital of Cuba On March 20, 2016 local time, US President Barack Obama arrived in Cuba to start a historic visit to "break the ice on US-Cuba relations". The "Cuban Missile Crisis", "The Bay of Pigs Landing" These historical events that were written in textbooks to reflect the bad relations between the United States and Cuba were finally rewritten by a historic event today. Obama also became the first US president to visit Cuba in 88 years. The last time a sitting US president visited Cuba to "shake hands" was in 1928. Obama's visit to the "backyard neighbor's house", the outside world believes that the diplomatic relations between the two countries are being "irreversibly" normalized, which is a diplomatic legacy left by the end of Obama's term. Although it is considered that the visit to Cuba is a show, its historic significance is still self-evident. Obama's visit to Cuba comments: "Breaking the ice" is easy and "melting the ice" is difficult. Since Obama took office, the US-Cuba relations, which have been interrupted for more than half a century, have rapidly warmed up. In 2015, when Obama delivered his State of the Union address to Congress, he said that the normalization of relations between the US and Cuba was an important achievement during his tenure. When Obama took office in 2009, he believed that the previous US policy towards Cuba had not been effective and that a "new era of US-Cuba relations" needed to be opened. In December 2014, the two countries announced the official start of the Mr. Obama and Rau ́ l Castro met formally for the first time in Panama in April 2015. In February 2016, the United States and Cuba signed a bilateral aviation agreement to resume commercial flights between the two countries. But there are still many unresolved differences between the United States and Cuba, which have been feuding for many years. For example, Cuba demands the complete lifting of the economic blockade that the United States has maintained for more than half a century, the return of the Guantanamo Naval Base, and the compensation of hundreds of billions of dollars from the United States as the loss of the blockade against Cuba for many years; the United States demands the release of political prisoners, and hopes that Cuba will open up the party ban, free elections, and the Cuban economy will be further privatized and opened to the outside world... These demands issued by the United States to Cuba touch on the fundamental policy of Cuba. Dealing with these issues requires long and arduous negotiations and cannot be resolved by a single visit. According to the analysis of Nate Freeman, an analyst at the American Policy Institute in Washington, there is still a lot of resistance in the United States, especially in the Republican Party, against the normalization of US-Cuba relations. To truly lift the trade embargo against Cuba, it needs the approval of the US Congress to lift it. The current Congress is controlled by the Republican Party. Obama's term of office is less than a year, and his ability is really limited. Although he has taken some measures to "loosen" Cuba, Obama has not used too much of the executive authority granted to the president by the constitution on the Cuban issue, and has not introduced many policies to promote practical impact. On March 20, 2016 local time, Havana, Cuba, the Obama family visited the Cathedral Square in the rain. In 1959, after the victory of the Cuban Revolution, the United States has always adopted a hostile attitude towards Cuba. On January 3, 1961, the United States announced the severance of diplomatic relations with Cuba. On April 16, 1961, Fidel Castro announced that Cuba had begun a socialist revolution. The next morning, more than 1,500 mercenaries supported by the United States landed from the Bay of Pigs in southern Cuba and invaded Cuba in an attempt to overthrow the Cuban regime, but were defeated, known as the "Bay of Pigs Incident" in history. In February 1962, then-US President John F. Kennedy signed a decree formally declaring an economic, financial and trade embargo against Cuba. In October 1962, the "Cuban Missile Crisis" broke out. In 2001, after the "9/11" incident, the US government accused the Cuban government of conspiring with a few countries to undermine political stability in Latin America, support terrorism and develop biological and chemical weapons. In May 2004, US President Bush proposed a further pressure plan to impose an economic embargo on Cuba, implementing measures such as financing anti-Cuban activities and promoting other countries to oppose the Cuban government. In January 2009, Obama entered the White House. On March 10, the US Senate passed a bill to partially lift US sanctions against Cuba, amending the highly controversial embargo law against Cuba. In April of the same year, Obama announced a series of measures to ease restrictions on Cuba. On December 17, 2014, the top leaders of the United States and Cuba delivered separate speeches, announcing that they would start consultations on restoring diplomatic relations between the two countries. On May 29, 2015, the US State Department announced that Cuba would be removed from the blacklist of "state sponsors of terrorism" with immediate effect. On July 20, 2015, the US and Cuba reopened embassies in both capitals. On August 14, 2015, US Secretary of State John Kerry visited Cuba, the first visit by a US secretary of state since 1945. On December 11, 2015, the United States and Cuba announced that they would resume direct mail services between the two countries, which had been suspended for more than half a century. On February 16, 2016, the United States and Cuba officially signed a commercial aviation agreement between the two countries, allowing US airlines to operate direct commercial flights to Cuba. On March 17, 2016, the Cuban Foreign Minister announced that he would conditionally lift the 10% tax on the use of US dollar cash. On March 20, US President Barack Obama (right) stepped out of the cabin at Jose Martí Airport in Havana, the capital of Cuba. Obama visits Cuba Obama visited the Old City of Havana, which is listed as a World Heritage Site. Locals also displayed a statue of Lincoln. Obama is a "Lincoln fan". Both inaugurations used the Bible oath that Lincoln used that year. Obama visits the Old City of Havana. The Old City of Havana is an area built and developed by Havana, the capital of Cuba, during the Spanish colonial rule. It has different styles of buildings in various periods. In 1982, the Old City of Havana and its fortifications were listed as a World Heritage Site by UNESCO. The Old City of Havana is an area built and developed by Havana, the capital of Cuba, during the Spanish colonial rule. It has different styles of buildings in various periods.