What should I do if there are principled errors in the design of the utility model patent that has been authorized for publication?

First of all, give a thumbs up to the author of the question. Now there are not many people who find mistakes and want to take the initiative to withdraw.

If you want to terminate the patent right, it is easy to do. You can do it without paying the fee or voluntarily terminate it. But I can't find it online. As far as I know, it's not possible after the announcement. It can be retrieved even if it is declared invalid.

You can consider applying for another patent to correct the mistakes and use the same name to facilitate retrieval.