Worries

Twenty days quarantine is a bit much seeing how it is supposed to be 14 days but that's okay, the symptoms will show in the first couple days or so in case things go bad which I'm confident won't.
I hope :)
Firstly Shanghai isn't as affected by the virus and also I'm guessing that there would be no one sick traveling on the flight.
Almost everyone on board will be from the homeland returning back since anyone who ain't a citizen travelling from China won't be allowed to enter the country, and I'm thinking that they'll all be a healthy lot.

Moreover there will be screenings done before entering the airport, before taking the flight, after landing and yes I will stick to the quarantine measures, though not so fastidiously if I know I'm not falling sick.
In case however I feel under the weather I'll be immediately reporting to a hospital.
But let's not think of the worst now.