Legal analysis: If there are clear terms in the agreement that will take effect after being sealed, but only the legal representative signs it and does not affix the official seal, the agreement will not take effect. If there is no such clause that comes into effect after being sealed, the agreement will come into effect when both parties have the signatures of legal representatives and no official seals.

Legal basis: Article 490 of the Civil Code of People's Republic of China (PRC). If the parties enter into a contract in the form of a contract, the contract shall be established when the parties sign, seal or press their fingerprints. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.

A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.