Why did the old fisherman in the ancient poem Jiang Xue fish alone on the frozen and inaccessible river? Can he catch fish?

That guy is a hermit, living in a secluded place. Generally, this kind of hermit is lazy, never knows how to store food for winter, and there is nothing to eat in winter! Even the birds on the mountain flew away because of the cold, so he had to do something about the fish. In winter, the river freezes. It is said that if the ice is smashed into a hole, the fish in the water will breathe around the hole, so it is good for fishing. He is also a clever hermit, so you don't have to worry too much about him not catching fish.