Triplet brothers Zhang Jian (front), Zhang Zhong (center), and Zhang Hua patrol the Gonglongping state-owned tree farm in Bijie City, Guizhou Province, March 10, 2019. Influenced by their father, the three brothers began to work as rangers in the farm in 1981. The tree farm covers an area of 53,300 mu (3,553 hectares) and the brothers usually walk approximately 30 kilometers on average per working day. Guizhou has about 3,000 registered rangers who work in tree farms totalling 5.55 million mu. (Photo: China News Service/Qu Honglun)

Zhang Zhong (front) and his brother Zhang Hua, two of three triplet brothers, drink water from a river while on patrol in the Gonglongping state-owned tree farm in Bijie City, Guizhou Province, March 10, 2019. Influenced by their father, the three brothers began to work as rangers in the farm in 1981. The tree farm covers an area of 53,300 mu (3,553 hectares) and the brothers usually walk approximately 30 kilometers on average per working day. Guizhou has about 3,000 registered rangers who work in tree farms totalling 5.55 million mu. (Photo: China News Service/Qu Honglun)