Guardians of the lush mountains and lucid waters

A still from CGTN's "Journeys in Nature" documentary series shows Li Yuhua, the first female forest ranger among the Drung people in Dulongjiang Township, Gongshan Drung and Nu Autonomous County, Nujiang Lisu Autonomous Prefecture, Yunnan Province, southwest China.

A still from CGTN's "Journeys in Nature" documentary series shows Liang Zhongjun, a ranger, who patrols twice a day at the Lashihai Plateau Wetland Provincial Nature Reserve in Lijiang City, Yunnan Province, southwest China.

A still from CGTN's "Journeys in Nature" documentary series shows Li Wenliang (L), a ranger at the Hanma National Nature Reserve in search of the moose, Hulunbuir City, Inner Mongolia Autonomous Region, north China.

A still from CGTN's "Journeys in Nature" documentary series shows monitor Diao Faxing with Asian elephants in Pu'er City, Yunnan Province, southwest China.

A still from CGTN's "Journeys in Nature" documentary series shows Wu Yonglin, head of the South Shore Protection Station of Qinghai Lake National Nature Reserve, tending to a Przewalski's gazelle in Hainan Tibetan Autonomous Prefecture, Qinghai Province, northwest China.

A still from CGTN's "Journeys in Nature" documentary series shows Zhao Fuzhou, a fire lookout who has secured the Dahuanqi branch of the Saihanba Mechanized Forest Farm for four decades, Chengde City, Hebei Province, north China.

A still from CGTN's "Journeys in Nature" documentary series shows Li Chunru (L), a vet for migratory birds who has kept a "bird care diary" for 40 years, Jiujiang City, Jiangxi Province, east China.

A still from CGTN's "Journeys in Nature" documentary series shows Xiong Youfu, an observer at Dazhaizi station, looking for the western black-crested gibbon in the Wuliang Mountains in Pu'er City, Yunnan Province, southwest China.

A still from CGTN's "Journeys in Nature" documentary series shows Li Li, founder of the animal protection NGO Black Leopard Wildlife Protection Center, tending to a black stork, Beijing, China.

A still from CGTN's "Journeys in Nature" documentary series shows Jang Tendar, who returned home after graduation and dedicates himself to protecting the ecological environment of Sanjiangyuan area, northwest China.