Ian Bremmer shares his insights on global politics this week with a look at Peng Shuai's public appearance, El Salvador's "Bitcoin City," and Americans' Thanksgiving celebrations.

Why has China silenced its famous tennis player, Peng Shuai?

Well, they haven't completely silenced her in the sense that the head of the IOC, the International Olympic Committee with Beijing Olympics coming up, basically told the Chinese government, "hey, what is the absolute minimum that you can do so that we can get Beijing Olympics back on track?" And they did the absolute minimum, which was a half an hour phone call with her that felt like kind of a hostage phone call. But nonetheless, she says that she is fine and is private and doesn't want to talk about the fact that she had accused the former Vice Premier of sexually assaulting her. That is a fairly heady charge. It was clear, going to get a lot of headlines in the run-up to the Olympics. And she wasn't heard from after that. So big problem for the Chinese in the run-up to the Olympics.