Legal analysis: When there are multiple contract-specific seals at the same time, numbers must be added to them. Each chapter corresponds to one person for safekeeping. Just to facilitate identification and subsequent accountability.

Legal basis: Article 490 of the "People's Republic of China and Civil Code" Where the parties conclude a contract in the form of a contract, the contract is established when both parties sign, seal or fingerprint. Before signing, sealing or fingerprinting, one party has performed its main obligations and the contract is established when the other party accepts it.