Slow access in China

Slow access in China

I have a collaboration tool developed in Zoho Creator.  People in the US/Canada and China are accessing it.   People in Zhejiang, China, today told me that the access is very very slow, unbearable so they can't do their job. 
Is there a way we can go around this?  The same people in the same location used to access Zoho Creator with decent speed.   Thanks.