In October and November, the Chinese sent over 5 million out of the country to spread the contagion around the world. If this is a second attack coming out of northeast China, then they don't have the 5 million army launched to spread it worldwide.
They don’t need 5 million this time. Each virus piggy backs on the one before it.
This is my biggest concern with the asymptomatic people and initial weak/mild response. They were compromised and didn’t or don’t know it.