Google Translation:

One person registered with multiple IDs, please report it.

Site does not allow more than one ID per person, registered users with more than one ID, please be sure to report.

The report posts are as follows:
Here

After filing, those who register multiple IDs will retain one ID, and those who do not report here will face the risk that many registered accounts will be banned.

The filing date is three days, from 0:00 on December 26, 2018 to 24:00 on December 28, 2018.

Please do not underestimate the site's determination to deal with such a one-person multi-ID, please cherish your account. Please don't take chances!