1, San Xiao realizes that his behavior is illegal and is willing to return the house, so both parties can settle the matter through consultation. The original match can ask Xiaosan to return a house and bear relevant legal responsibilities, and Xiaosan can also make up for the fault by apologizing or compensating.

2. San Xiao doesn't want to return a house, and the original owner can protect his rights and interests through legal channels. You can bring a lawsuit to the local court and ask San Xiao to return the house and compensate the related losses. In this process, seek the help of professional lawyers to ensure that rights and interests are protected.