That is a weak world economy, Trump became the president of USA and Chinese Economy is in bubble status. They are afraid of currency devaluation so that many people have bought bitcoin for holding and it has made the price higher.
All Asian exchanges, not only Chinese had higher rates last week then others.
Trump elections did not made CNY value decrease, but made USD value increase, since CNY rate did not change to other currencies, but USD did raise a lot in last months.
I could agree that there could be speculation of CNY devaluating more.
Of course I am saying this only of last few weeks when price went $900+ before I dont think Asian exchanges had so much higher prices.