The legal effect of the contract is not determined by handwriting or printing, but by the signature and seal of both parties. If both parties sign the contract voluntarily, the contract will have legal effect after signing, and both parties must implement it according to the contents of the contract. If one party proves that it was forced to sign by coercion, it has no legal effect. In addition, there are contracts with legal guidance, such as labor contracts. The content of a company's labor contract must generally be consistent with the content of the labor contract law. If the contents of the company's labor contract violate the provisions of the labor law, then this clause is invalid.