"Zeng, who is leading the Chinese government's efforts to respond to the outbreak, made clear that his recommendation was not a government-imposed quarantine."
Government officials are being prohibited from leaving, not regular citizens.
Wuhan is in the middle of China, every transit passes through it. It’s like the Chicago of China. There is no way in hell the government is going to able to lock it down.
and yet they just did
Logistically, how can they do this?
China has the largest active military in the world, according to this list in Wikipedia: