Nginx 重写规则请教

如何用 rewrite 重写网址：
https://weixin.domain.com/m/#!/sethelp/setindex

到：

https://www.domain.com/sethelp/setindex

试了 N 遍和 N 种方法，那个 #！字符匹配老是有问题。

1. rewrite /m/#!/(.*)$ https://www.domain.com/$1 break;
2. rewrite /m/([#!]+)/(.*)$ https://www.domain.com/$2 break;

3.

location ^~/m/ {
proxy_set_header X-Forwarded-Proto https;
proxy_set_header X-Forwarded-Port $server_port;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header Host www.domain.com;
proxy_redirect off;
rewrite /m/([#!]+)/(.*)$ /$1 break;
proxy_pass https://www.domain.com/;
}


请大神帮忙看如何解决？