My parents lived in my daughter's house all the year round, and now they are dead in her house. What's wrong with that?

Either put it in the son's house to do things, or send it back to the old man's original home without a son. This is a rule laid down by our ancestors. Even the emperor and Lao Tzu have to abide by the tradition of China people. There is no example of working in a daughter's house. This will affect the parents of their daughters and in-laws. It is even more taboo for outsiders to see that your in-laws and parents are dead.