Advice on how test a website as a user in mainland China?

I have a website that is blocked in mainland China, but using Google as an example here on Hacker News how do I simulate being a user from mainland China?

I tried using HideMyAss VPN with the Beijing location selected but the website still works.

Webpagetest.org [0] shows the correct result of the website being blocked, but is there a VPN or some other way of testing?

[0]: https://www.webpagetest.org/result/200130_QS_4b5ae06bfefbeea752d56f544e3c7a19/