Legal analysis: the procedure of signing a contract in duplicate in different places: after all the terms in the contract are agreed by both parties, it meets the premise that both parties sign the contract voluntarily. Then one party stamps and signs first, and sends it to the other party by courier, and the other party stamps and sends it back to the original.

Legal basis: Article 493 of the Civil Code of People's Republic of China (PRC).

Where the parties conclude a contract in the form of a contract, the place where the contract is finally signed, sealed or fingerprinted shall be the place where the contract is established, unless otherwise agreed by the parties.