Such an electronic contract has no legal effect, because no one can prove its authenticity through PS. According to the law, only electronic contracts with reliable electronic signature technology have the same legal effect as handwritten signature buttons.

A reliable electronic signature needs to meet the conditions that the electronic signature data is exclusive to the signer, controlled by the signer and has not been tampered with since its generation, and the law requires the preservation of the electronic contract and its original form. The electronic contract signed by oneself has low probative power, and it needs to prove the authenticity of the signature and that it has not been tampered with, so the proof is more complicated.

Electronic signature refers to the data contained in the data message in electronic form and accompanied by data used to identify the identity of the signer and show that the signer approves its content. Generally speaking, electronic signature is an electronic signature of electronic documents through cryptographic technology, which is not a digital visualization of written signature, but similar to handwritten signature or seal, and can also be said to be an electronic seal. The purpose of electronic signature is to sign the electronic version of Mid-Autumn Festival greeting cards, invitations and construction contracts.