I am English and I live in China, I want your site to work too.
However the fact is that many websites are slow or inaccessible in China for a variety of reasons.
For example it may be that your website design uses uses certain images/scripts/fonts/distribution networks which are blocked in china and prevent your website loading properly.
I will give you my recommendations including an analytic report for your website showing detail China load timings and errors for the files used by the web link you provide.
As an optional extra I will record and send you video of your page loading so you can see what the user experience is like from China.
China accessibility report
Recommendations and detail on page load issues in China