Bayanbulak is China's largest swan reserve in northwestern Xinjiang Uygur Autonomous Region. Regarded as angels by Mongolian herdsmen, swans not only find the environmental conditions favorable to their stay, but also receive exceptional care from local rangers. Having found a deep connection with the swans, rangers at the reserve tend to them as if they were their children.

This is one of many stories in CGTN's exclusive documentary "Beyond the Mountains: Life in Xinjiang." Watch the full documentary here.