Hello, I'm glad to answer your question. The electronic signature platform in Shandong market forgot the user name, so it cannot be changed to 1. This is an abnormal phenomenon. If it is the first time for you to fill in the registration information and download this platform, it may be that your ID number has been fraudulently registered on this platform by others, and you may not know it yourself. 2. You have registered once before, and then the information of your ID number has been registered in the system. If you can't remember yourself, you are already a user. Now you just need to retrieve your password and log in again. Neither of the above situations exists. Maybe there is something wrong with your equipment or your system.