Whose name is the 9-year-old man buying a house?

it depends on the wishes of the elderly. If the old man is willing to write his own name, write his own name. If the old man wants to give this house to a child, he can also write the child's name. It depends on the old man's meaning.

Of course, life is never right or wrong. If the old people already have a house, their children are filial to themselves and have enough pension money, and buying a house is a happy thing for the whole family, there is no need to be unhappy with their children in order to buy a house and write their names.

The times are developing. It's good for a 9-year-old man to write his name "selfish" when buying a house.