In the hall of the 'mountain king'

Ask anyone in Yichun, Heilongjiang province, for the name of the person who knows the surrounding mountains and forests best and you'll get the same answer: Gege Shanhuo, or "Brother Mountain Food".

Having been born and raised in the mountains, and having earned a living collecting mountain produce for more than two decades, Zhang Baoku revels in his nickname. He's one of the few people left in the city who's still engaged in work that involves hardship and danger.

The 48-year-old father of two lives with his wife and children in a small house at the foot of a mountain in the south of the city. From outside, the house barely looks habit-able, but once you enter you're in a different world.