Hi Francis,

Thanks for your reply.

Since I'm not in the website develop team, I cannot let them change the url structure:(

Now, I'm tring to use URL rewrite.
I've tried the following:
==============================
location /site1 {
rewrite ^/site1/(.*) /$1 break;
proxy_pass https://10.1.1.1;
==============================
However, it didn't work and I got a Http 404 error.

If URL rewrite can help in this scenario, is there anything wrong with my rewrite rule?