As there is a good chance many of the asics are already run at a loss.
This is statement is unfounded at all. Electricity could be very cheap in some part of China
So what? The police will just find a computer farm instead of a cannabis farm.
http://translate.google.co.uk/translate?hl=en&sl=zh-CN&u=http://www.360doc.com/relevant/212102353_more.shtml&prev=/search%3Fq%3D%25E4%25B8%25AD%25E5%259C%258B%25E9%259B%25BB%25E5%258A%259B%25E6%2588%2590%25E6%259C%25AC%26client%3Dfirefox-a%26hs%3Dzmj%26rls%3Dorg.mozilla:en-US:official%26channel%3Drcs
1.00 USD = 6.14322 CNY
1 CNY = 0.16 cent
very low cost electricy in china is about 0.5 CNY (8 cent per KW/h)
even if the price of EQ is $2000 per TH and it the most effienet machine @ 0.7 watts per GH then it's still run at a loss and at current rates would never break even. Even if the EQ was free, and it's the most efficient Asic available it would still only be making $12 a month by December (at current difficulty increase). Similar conditions (only more extreme) than October last year. BTC is very undervalued.
As for the authorities, finding such an operation I suspect the tax man might be interested, I doubt they would just walk away after finding a 1/4 of a billion $ setup.
If that's true no one in China (and most parts of the world, actually) should be mining, as they could get more bitcoin by simply buying from the market.