Personally, I think that if the information of both parties has been listed in the front part of the contract (if you pay more attention to the original contract, the information of both parties will be written in the front part of the contract), although both parties signed in the wrong place in the final signing process, the contract is still valid, because according to the trading habits, both parties reached an agreement, but signed in the wrong place, and the contract is valid.

If the information of Party A and Party B is not listed in front of the contract, that is, it is not confirmed until the final signature, who is Party A and who is Party B, the contract is still valid, but the contract can be terminated on the grounds that "there is a major misunderstanding between both parties or one party", because the performance of the contract requires both parties to have certain conditions. For example, if you buy two cars from the other party, the vehicles are obviously registered in the other party's name, so it is not too difficult for you to find the corresponding evidence.

Solution: It is suggested to conclude a supplementary agreement, stating that both parties signed the wrong place at that time, or re-sign the agreement. In order to prevent legal risks, even if a new agreement is signed, it is best to mention that the previous agreement is wrong and declare that the previous agreement is invalid.