Ask a nginx rewrite question, please answer, thank you

Question

rewrite "^/(\d+)\.html$" /cc// permanent;

This nginx pseudo-static rule, when accessing www.xx.com/404.html, that is, the 404 page in the root directory will jump to /cc/404/

How to modify and resolve the conflict between the content page and the 404 page

Answer 1

error_page 404 /404.html;
It should be possible to uniformly configure the 404 page in this way.