According to
mashable.com, China has blocked access to Foursquare by its users (the Great Chinese firewall, of course).
This is due to the fact that according to the Chinese authorities, the number of users made check-ins on Tiananmen Square is too large, the 21st anniversary of the events on which was yesterday, the 4th of June.
As experts from Mashable believe, access will be unlocked in a few days.
Is it so - let's see, but given China’s rather complicated relations with non-Chinese services, we can assume a “shutdown in general” scenario.
Moreover, China, even on the Internet, professes borrowing tactics - China has its own PB (qzone.qq.com) with almost 400 million users, there is an analogue of ICQ (qq) (by the way, the owners are the same, Tencent) and in general, such censorship is good because it is possible to transfer users to “national services” almost in the form of an order, after they have already tried out the idea in Western projects.