Good question. I doubt Steemit is greenlighted in China due to the nature of the content. I think Facebook is in China but it is seriously limited, at least based on what I have read on there from friends that are in China, or have traveled there.

Steemit though does not have any method of "censoring" anything in particular here at the "corporate" level like Facebook does. There is no corporation behind Steemit so it is open all the time.