Xu Guoan, born in Taizhou, Zhejiang Province, China, is a natural photographer. He was born in 1954 and suffered from esophageal cancer in 1996. He began to take photos in 2007. He has been to Tibet, China for 16 times (including six times when he entered the no man's land with an altitude of more than 5000 meters). He has successively visited the Arctic point, Antarctica, South America, North America, Africa, Asia, Oceania, New Guinea and Europe to photograph wildlife.