The way chinese censorship works is... erm.. innovative. There isn't an actual censor who approves stuff, or a list of things that are censored. Companies are

The way chinese censorship works is... erm.. innovative. There isn't an actual censor who approves stuff, or a list of things that are censored. Companies are expected to reason about it themselves. More broadly, a lot of things are more/less sensitive at particular points in time. This does suggest that stuff was happening at msft, in anticipation of heightened sensitivity because of the 30 year anniversary.