This dude knows what he's doing. As a westerner he's rapidly becoming the biggest internet celebrity that exists there.
Look at all the western videogame companies that have been trying to pander to China with content for a couple years now, streamers lag behind but they have just as much reason to try and get a Chinese audience and significant fanbase as anywhere else.
When streamers realise that there's a significant revenue stack to be made from Chinese audiences we're going to see a U Turn in how online influencers portray China as they all try to pursue the money to be made by having them as part of your audience.
Speed is demonstrating exactly how to build that and there will be others that realise and follow the same path. As influencers start to notice that "oh you get Chinese state media attention and enormous publicity if you make China look good" they're gonna do exactly that.
Do not think for a second that these streamers are not thinking in terms of audience segments and metrics.