I don't see how chinabitcoin.com can be this worth.
It's totally worthless because chinese people would search for 比特币中国 (already taken), rather than "china bitcoin".
Why they would search in english if they could use their own language?
You can't see "how" because you're not familiar with the domain name industry - or - the valuation metrics and development potential of such a name. It's ok!

I will not lose any sleep over you not understanding. As the OP, I was merely passing along industry related research for the public to digest.
For your information, "China Bitcoin" is searched 720 times per month with a suggest bid of $2.09 per click, which is represented by Google within the advertiser dashboard. There are 156,000,000 results in Google for
China Bitcoin and 164,000 results in quotes; "China Bitcoin".
Further, on
Google.com.hk there are 180,000,000 results with 164,000 in quotes. That's a lot of information, a lot of interest, and a lot of potential.
Like it, love it, hate it...or don't quite understand it, it's a reality.