This is way, bitcoin might got spread out into Chinese people more. So they are obviously contributing to demand of crypto currencies
if in your city you see someone has a successful business of any kind and he is earning good money from his business, will you start getting into that business also? the same is true about bitcoin. and a mining farm is not a crazy amount of profit as you may think compared to many other businesses out there.
those mining farms have sweat their asses off to be where they are right now, they had to grease so many hands and kiss so many bottoms to get some of their contracts like their electricity