You're over worried.
Maybe so - but running a site that allows you to change any sort of "virtual currency" into RMB is strictly illegal in China.
So if the guy is really so easy to find then I guess he is the one who should actually be more worried.
Again, you're over worried FOR HIM. most of Chinese enterprise is doing something illegal everyday, for example,
1. tax evasion.
2. there are lots of Chinese companies that is now listed in America, such as Baidu.com, Sina.com. However, their law structure is actually illegal.
3. Lots of big online game is running some gambling program, Open boxes, which will give you an opportunity to win very awesome weapons but you have to try many times with great money. it's illegal, it's forbidden, it's criticized by the newspaper, it's running everyday.
In Chinese, the law that governs this area is not so important. The law governing the virtual currency is given by the Ministry of Culture and the Commerce Department. it actually should be named as "regulation", not "law".
it's As long as the btcchina.com is small, the owner of btcchina should not be worried.
However, this is not a business which could be last.