If you want to find China .gov.cn blog, using site:.gov.cn inurl:blog post
You could also modify each string with the following: inurl:guestbook
or inurl:blog “your thoughts” , inurl:”post a comment” inurl:wordpress etc etc.
And if that doesn’t work, this might help:
site:.gov inurl:blogs”post a comment”-”comments closed”-”you must be logged in”