First of all: the mobile phone number registers the micro signal and logs in.
Secondly, you can scan the picture into the computer. The picture is on a white background. Try to compare and set the resolution to 192.
Thirdly, the signature and signature can be stored in UKey, and the private key can be verified when signing through Ukey, so as to protect the security of the signature like a bank card, or a user group can be established to authorize the internal friends or external customers of micro-signature.
Finally, you can add a digital certificate to the document to prevent it from being tampered with, and then you can stamp it.
To sum up, it is the process of micro-signing electronic signature.