Effective, as long as it is the true intention of both parties, it does not violate the law. However, from the point of view of legal risk, it is still recommended to use the written original. In case of a contract dispute, it is impossible to prove the agreement between the two parties at that time and protect the rights and interests of the parties. From the point of view of evidence, the scanned document is a picture, which exists in the form of a copy and can be tampered with technically. Therefore, the proof function of the scanned document itself is very low. Unless the other party approves the scanned document, it is necessary to provide other relevant evidence to support it, forming a chain of evidence. The scanned document can be used as the final evidence and has high probative effect. A scanned copy is equivalent to a photocopy, and it is difficult to get court support by going to court alone.

Article 490 of the General Principles of the Civil Law When concluding a contract, if the parties conclude the contract in the form of a contract, the contract shall be established 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.

A contract shall be concluded in written form as stipulated by laws, administrative regulations or agreed by the parties. If the parties do not do this in writing, but one party has fulfilled its main obligations and the other party accepts it, the contract is established.