China is doing what we do to them. We have sent planes over China or very near China over their 12 miles zone for nearly 100 years. They have not shot down anything. But in the past two decades they have started to defend their airspace. Both America and China have thousands of low atmosphere satellites which surveil the area underneath them. They listen and they record anything they can, light, energy output, heat, traffic, communications, etc. Google maps is output from these satellites. Chinese may be doing the same.
But something to watch out for, is that China claims the entire China sea. Which reaches out to the Philippines and down to Malaysia, Vietnam and North to Japan. China may start shooting down airplanes in that area. They will site our destruction of their balloon for the reason.
I think you forgot the P-3 incident. China did force one of our surveillance planes to land.