Legal analysis: an agreement signed by only one party generally means that the contract is not established. However, before one party signs or seals, the other party has fulfilled the main obligations in the contract and holds relevant evidence of the fulfilled obligations. If the other party approves, the contract is established and takes effect immediately.

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

Article 490 Where the parties conclude a contract in the form of a contract, the contract is formed when 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 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.