Remember all the good news out of china, and that positive piece that aired on a government sponsored channel? You just know some nasty corrupt motherf**king pig of an official over there got rich off of this. Pump and dump on an international scale.
So let's assume our mystery official bought a bunch of bitcoin when s/he first heard about it, then talked it up/endorsed it in China, the price rose massively, s/he sold out, then shorted, then came out with the banking ban and got coverage with the above tone started. Price went down, and whoever it is covered the short and now has an acre of money.
The cool thing about that game is it can be played several times. China in -- price goes up. China out -- price goes down.
If our mystery official wants to go back to the pump, s/he's buying up coins now. S/He'll wait at least six months to keep the cognitive dissonance to a dull roar, then go to work on getting the banking ban overturned and start to talk it up again.