The contract signed by Dafa is legally binding, and the contract signed by Dafa is legal and valid. According to Article 13 of the Electronic Signature Law of People's Republic of China (PRC), an electronic signature shall be regarded as reliable if it meets the following conditions at the same time: 1. An electronic signature belongs to the electronic signer when it is used for electronic signature. 2. When signing, the electronic signature production data is only controlled by the electronic signer. 3. Any changes to the electronic signature after signing can be found. Any changes in the content and form of the data message after signing can be found. The parties can also choose to use electronic signatures that meet their agreed reliable conditions.