Tian Yuchun takes a bucket of corn to the road at the foot of a mountain at the Helanshan National Forest Park in Northwest China's Ningxia Hui autonomous region.

He shouts to the mountains, "Come for food". After a while, roughly more than 100 bharals, a second-class national protected species good at climbing cliffs and living in groups, come to the man in response to the voice that seems familiar to them.

The harmonious interaction between Tian and the bharals, a goat-like animal also known as the blue sheep, is a common scene in the park.

A forest ranger at the park, Tian has been feeding the bharals - there are a total of about 40,000 in the park - for 5 years.

Tian said he feeds the bharals in winter and early spring when nature provides limited food.

Huang Chen contributed to the story.