an example for amp?

hello, please give me an example..

https://www.mysite.com/bla-bla-bla-sub-page/amp/
to
>>>
https://xxx-mysite-com.cdn.ampproject.org/c/s/xxx.mysite.com/bla-bla-bla-sub-page/amp/

and

https://xxx.mysite.com/category/general/amp
to
https://xxx-mysite-com.cdn.ampproject.org/c/s/xxx.mysite.com/category/general/amp

=====================================
Sub domain name with “xxx”.

friends want to use amp too.
Can anyone show me how to add these two to me?

I don’t know regex ..

thank you