Legal analysis: for a contract signed by only the legal representative, the validity of the contract cannot be denied on the grounds that the official seal of the company is not affixed. As long as the performance of the contract is confirmed to be the true intention of both parties, there is no special agreement between the two parties on the validity of the contract, and there are no exceptions such as the legal representative exceeding the authority, the contract should be considered valid.

Legal basis: Article 61 of the Civil Law of People's Republic of China (PRC) According to the provisions of the law or the articles of association of the legal person, the person in charge of civil activities on behalf of the legal person is the legal representative of the legal person.

The legal consequences of the legal representative's civil activities in the name of a legal person shall be borne by the legal person.

The restriction of the legal representative's representation by the articles of association or the functions and powers of the legal person shall not be against the bona fide counterpart.