Many websites and services could not be accessed in china mainland (or too slow), that affected normal use of wordpress. Thanks to genius guys, most of the problem could be solved, here is a list:

• How to fix gravatar not shown in china mainland?
• Where to download or upgrade chrome in china mainland?
• Which ISP should you choose in china?

Aware situation is always changing, last update time of this page is 2015-08-13.