Of course, the decision of the Chinese regulator was quite predictable. There may be several reasons for this, but it seems to me that 2 reasons can be considered as the main ones. 1 reason - this is the plan of the Chinese government for the expansion of the yuan in the global economy. China has long dreamed of making the yuan a world currency, and it is possible that Bitcoin will be able to prevent this. Despite the fact that the main part of miners is located in China, the bitcoin, unlike the yuan, is not affected by the Chinese regulator. And it bothers them. 2 reason - because of bitcoin, the shadow economy can grow and the withdrawal of money abroad. This is also a fairly significant factor, which can not be disturbed.
I agree many can argue that the money drain from China will be reduced but to be quite honest will it? Look at Canada for example, Vancouver has been dubbed the ERNAI CITY for Chinese to take on 2nd wives and Mistresses, in order to get their foothold in another country. It's being done on a large scale by Rich Chinese Men in general. Here also, we have many Rich Chinese getting European passports by buying luxury properties. Nothing wrong with that at all, investing in different countries, that's what rich people do, but I doubt they blocking mining in China will stem the flow of money OUT of China. Bitmain and other miners will just move to pro blockchain countries like Vietnam or Latin America where the electricity is cheap and keep mining, taking away jobs from China. What I do see though is an electronic Yuan coming and a more centralized digital currency taking a foothold in China. Blockchain is not discouraged in China, on the contrary, you got coins like TRX, TRON run by great Chinese Businessmen with a wonderful acumen for business, it's just that Bitcoin seems way too decentralized now for the Chinese Govt to be able to control. Every country, of course, needs to do what it needs to do to protect its own. I understand the philosophy behind the Govt there. Make our currency strong then we can adopt other stuff..