In my opinion, this is just another baseless speculation or another category of FUD. China has already made it clear that they don't want anything to do with cryptocurrency anymore except maybe their own state-sponsored and issued cryptocurrency which may not materialize at all. Lately, they are already sending a strong message to Bitcoin miners locating within the country to think now of moving out of the country as the environment is not anymore conducive to such an activity. China is a big market for cryptocurrency and in fact there are still so many Chinese which is into this discreetly but since the government has a different views on it then it would be better that we stay away from China.
Posts like Op makes one wonder how convenient it is for people to sit down and make a well thought fabrication to make it seems the right one. Times without number we heard news from China and every thing has been on the negative concerning crypto currencies. Not that policies cannot be changed, but the body language of the parties involved is also something to consider as well and the body language of the Chinese authorities suggest otherwise on everything Op has announced.
Just not too long ago, we heard about how their cracking down on Mining sites have taken a new turn to make it more difficult. A government that is looking to resurfacing a crypto currency will surely not tow that part and for concluding that because of AliPay hack will just give a sure pass to crypto currency is saying there is no other option to hacking other than that when all that would be needed is to update a more secure firewall.