When the computer version of the educational technology service platform cannot log in, press "Switch Line" and try several times. Only after the mobile version is successfully registered can you log in to the computer version. You can't upload the electronic version of the student status confirmation photo. I can only see how many parents have registered, but I can't see whether they have uploaded them. It's no use. It can be used as a chat tool in the future. The question is who will use it?