Hello, housing replacement means a vague concept. It is actually two transactions. For example, Party A and Party B are two parties to the transaction. Party A has a house in Area A and Party B has a house in Area B. Party A wants to move to Area B and Party B wants to move to Area A, so both parties can exchange houses, but it is not really as simple as changing houses, but two transactions are needed, that is, Party A buys Party B&;s house and Party B buys Party A&;s house. The transactions can be carried out at the same time, and both parties can trade equally. If it exists, I hope it works for you!