Located in a Yi County in S province of China, there is a black bamboo ditch, where there is a large area of primitive forest, ancient trees towering in the sky, growing dense arrowheads, alpine lakes, legendary Buddha light, gorgeous azaleas are all the charms of this place. It can be said that the scenery is beautiful and the climate is pleasant.

But there is another side to this black bamboo ditch: ferocity and terror. The terrain here is extremely dangerous. The perennial fog makes it extremely cloudy. The fog sometimes comes near and goes far, sometimes moves quietly, sometimes bright and dark, which is unpredictable.

There is an ancient...