I've Traveled Through Time, but I Don't Have a Golden Finger

One day, Yi Yunnan traveled to a slum and became an 8-year-old kid. He was alone with no parents and no money. When he was hungry, he could only dig through buckets to find other people's leftovers. But there were many people like him here. A piece of black bread can even kill a person. Where should he go? After being robbed and looking for a little piece of bread for a long time, he had the idea of suicide. But for his sister who was still in the hospital in the previous world, he must live and find a way to go back. For my sister! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.