The website listed in the OP seems to just be a Chinese bitcoin news page.

Where is all this work being done? I assume down in Shenzhen?

Electricity is cheap in China, so the difference in investment cost for 130nm and 60 or 28nm etc is not worth the electricity savings I'd guess. But if this is meant to be an on going business I'd hope they would reinvest some profit into developing a smaller form factor for the future.

I'd certainly be interested, but only if I could travel down from Shanghai to have a look at test rigs etc.

As for not being able to access bitcoin traffic, just setup a private VPN in Hongkong or something. I've found accessing bitcoin and litecoin site patchy without a VPN, so it does seem the authorities do try to block them (when they know about them).