Js code loading problem in mainland China

Hi~
There are some js codes cannot be loaded in mainland China:

https://d3e54v103j8qbb.cloudfront.net/js/jquery-3.5.1.min.dc5e7f18c8.js
https://uploads-ssl.webflow.com/629863e01ee4d110c93b10e0/js/webflow.fe98d09f2.js
https://unpkg.com/counterup2@2.0.2/dist/index.js

Is there any chance we can change or remove some CDN by ourselves?

If you export your site and host it then yes. Otherwise no, with the exception of counterup2 which is not part of a Webflow build.