Legal analysis: The contract will come into effect as soon as both parties to the contract sign or perform the confirmation procedures (such as stamping the official seal or personal fingerprint).

if there is an agreement on the advance payment, and the agreed amount and delivery time, if the party fails to perform it, it will be a breach of contract and should bear the liability for breach of contract; If there is no agreement on advance payment, a supplementary agreement should be made. Failure to stipulate the advance payment does not affect the validity of other agreed items in the contract, and the termination of the contract must meet the conditions of contract termination.

legal basis: article 49 of the civil code of the people's Republic of China. if the parties conclude a contract in the form of a contract, the contract shall be formed when all the parties sign, seal or fingerprint it. 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 writing as stipulated by laws and administrative regulations or agreed by the parties. if the parties fail to do so in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.