Such a contract should be a house lease contract with undetermined validity. Because the content of the contract is the result of the agreement reached by both parties, which shows that it conforms to the true meaning of both parties, but the signature position of both parties at the end of the contract should be reversed, then such a contract should be corrected by correction without affecting the authenticity of its content. So both sides can make corrections. Once confirmed by both parties, the contents of the contract will be confirmed and the contract will take effect.