My first question would be "why does he think the numbers in China are declining so sharply after only a 0.005% infection rate?"
Either a) the US prediction model is wayyyy off, for whatever reason, b) China has figured this thing out and was able to miraculously arrest the spread, despite insane overpopulation, poor air quality, and limited resources, or c) China is pulling off the greatest cover-up in the history of the world (1/4 to 1/2 of their population would mean that 350,000,000 to 700,000,000 people would get sick, which would be 3500x to 7000x their reported numbers, thus far).