Local patrol officers head out to work in Silingtso National Nature Reserve in Nagchu, Tibet. [Photo provided to chinadaily.com.cn]

Tibetan brown bears in Changthang National Nature Reserve in Nagchu, Tibet autonomous region [Photo provided to chinadaily.com.cn]

Some argali wander in the Changthang National Nature Reserve in Nagchu, Tibet autonomous region. [Photo provided to chinadaily.com.cn]

A Tibetan patrol officer takes care of a lost Tibetan antelope lamb in Silingtso National Nature Reserve in Nagchu, Tibet. [Photo provided to chinadaily.com.cn]

A patrol officer take care of an injured Tibetan wild ass in Silingtso National Nature Reserve in Nagchu, Tibet. [Photo provided to chinadaily.com.cn]

Patrol officers feed an injured Tibetan antelope in Silingtso National Nature Reserve in Nagchu, Tibet. [Photo provided to chinadaily.com.cn]