On this day, 44 years ago, on March 9, 1981 (February 4, 1981, the Chinese famous botanist Cai Xitao passed away in Kunming. Cai Xitao (1911-1981), originally known as Zhongju, was also known as Kanru, and used to be Xuanpeng. He was born on April 10, 1911 in Caizhai Village, Hulu Town, Dongyang City, Zhejiang Province. When he was young, he loved literature and wrote the short story "Dandelion", which was praised by Lu Xun. Because his family was poor and difficult to go to high school, he entered the Beiping Jingsheng Biological Survey Institute as a trainee. In 1932, starting from Yibin, Sichuan, he walked along the Jinsha River into Yunnan for inspection, passed through Yanjin to Zhaotong, and formed an alliance with Black Yi slave owners drinking cow blood on Swan Street, and successfully entered Daliang Mountain. After three years of field investigation, more than 10,000 plant specimens were collected, and oil melons were discovered, which were successfully introduced. During the War of Resistance Against Japanese Aggression, the Beijingping Biological Survey Institute moved to Kunming and renamed it the Yunnan Province Agricultural and Forestry Research Institute. In 1938, the precious flue-cured tobacco Dajinyuan and Honghua Dajinyuan were successfully introduced to breed Yunnan No. 1. After the founding of the People's Republic of China, he served as director of Kunming Workstation of the Institute of Botany, China Academy of Sciences (later renamed the Institute of Botany). In 1955, Zhou Enlai and Chen Yi visited the station to solve problems such as funding and venue. Under orders to continue to search for plant resources, two three-leaf rubber trees were discovered in Ruili. In 1955, the seedlings were successfully grafted on the seedlings of the rubber seedlings and developed into a large-scale rubber plantation, making China one of the top rubber producers in the world. Joined the Communist Party of China in 1956. In 1959, the Yunnan Institute of Tropical Botany and Tropical Botanical Garden were established in Xishuangbanna, and soon the Damenglong Ecological Community Research Station was established. In 1961, Dragon Blood Tree, a precious internal medicine medicine "Dragon Blood" resource that had been imported since the Tang Dynasty, was found in Menglian Mountain. In the same year, he led a China scientific and technological delegation to visit Guinea, Morocco, Ghana and Algeria. In August 1972, he was ordered to organize a successful search for the anti-cancer drug Maytenwood. Life-long research and classification of plant resources have accumulated precious plant specimens and materials. He has done a lot of pioneering work for the research of plant resources science, plant introduction and domestication, artificial plant communities, etc., laid the foundation for experimental community science of artificial plants in China, and became a well-known botanist and plant resource scientist at home and abroad. He has served successively as a director of the Botany Society of China, vice president of the Yunnan Branch of the China Academy of Sciences, deputy director of the Yunnan Province Science and Technology Committee, and director and party secretary of the Yunnan Institute of Tropical Botany. Elected as a member of the Standing Committee of the Fifth People's Congress of Yunnan Province and a member of the Fifth National Committee of the Chinese People's Political Consultative Conference. His main works include "The Tragedy of Forty Cattle","Systematic Plant Classification","Flora of China","Plant Resources Science","Study on the Causes of Fruit Falling of Cucumber","China Science in the Past Ten Years-Biology II", etc. The translation is "Systematic Plant Classification".