Legal analysis: If the company only signs the contract without sealing it, if the parties have not agreed to seal it as an effective requirement of the contract, as long as the contract is concluded according to law, then the contract will be effective only if it is signed without sealing it. Signing and sealing are both effective ways to conclude a contract.

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

Article 143 A civil juristic act that meets the following conditions is valid:

(1) The actor has corresponding capacity for civil conduct;

(2) the meaning is true;

(three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.

Article 469 The parties may conclude a contract in writing, orally or in other forms.

A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.

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.