Photo shows black-necked cranes playing in the wetland in Lhunzhub County, Lhasa City. (Chinatibetnews/Yao Haiquan)

With the promotion of ecological construction and protection, people’s ecological protection consciousness increases continuously. Tibet is world’s largest wintering base for black-necked cranes. In recent years, the number of black-necked cranes increases year by year, which creates a harmonious scene between nature and human.