How can someone travel through time and space and become a beggar?

The sky in the beggar's den is stinky, the clothes are torn and fall apart when you pinch them, the shack is in danger, mushrooms grow on the beams and pillars, spiders hang on their faces, and the sky collapses. Xia Chu tried every possible way and finally gained a foothold in the city of Hangzhou, but his biological parents appeared...