Bama Yao Autonomous County of Guangxi Zhuang Autonomous Region is a national poverty-stricken county, the fifth longest-lived town in the world, with 30.98 centenarians per 6.5438+10,000 population. In recent years, many cancer patients who were sentenced to death in medicine gathered in Poyue, Ping 'an and Changshou villages along the Pan Yang River in Bama, and settled for a long time. These villages, which are not "rich" in cancer, have become the areas with the highest density of cancer patients except cancer hospitals. Some "migratory birds" who come here for recuperation focus on the life of taking water as the axis and taking oxygen at the entrance of Bai Mo.