Legal analysis: it should be combined with specific case analysis. If the contents of the contract are confidential, when the other party asks him to sign a confidentiality agreement, he should sign another confidentiality agreement. When it is necessary to sign a confidentiality agreement after signing a contract, but there is doubt about the specific contents of the contract, it is recommended to sign a confidentiality agreement.
Legal basis: Article 465 of the Civil Code of People's Republic of China (PRC). Contracts established according to law are protected by law.
A legally established contract is legally binding only on the parties, except as otherwise provided by law.