KYC verification is finally done, and it looks like if I go through a few more rounds, I will be restricted from operating. This solution is indeed feasible, sharing with everyone.

The key steps are as follows:
1- Complete identity verification using a Chinese ID card
2- Use China Unicom electronic invoice as proof of address

Specific operation: directly search for the invoice option in the Unicom app homepage, select the personal user category, and fill in address information consistent with the ID card. The system will automatically generate a PDF version of the invoice and send it to your email. When uploading, be sure to use a PDF file, do not take screenshots, as screenshots will be rejected, but the PDF version is almost instantly approved. This process has been verified as effective and is a relatively efficient solution.