Two things that make me laugh

1)  Conversations that I hear in passing that go like this:

"Chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese  chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese chinese oh okay."

2)  The fact that, when time is announced, the announcement starts with "Beijing time is..."

The entire country (minus perhaps some few very out of the way rural areas) is on the same time zone.