I just was in HK and saw all these domains he's posting. I PM'ed him for his location and he said Kowloon (where I was staying). Asked if he wanted to do something, no reply.
Amazed how offices and residential places are in the same buildings everywhere, I asked is it home or office.
Then I did a whois on one name, phone number area code 852 - 8888 8888, as that's the correct format, I thought nothing of it. Maybe the business bought the ultimate phone number for Chinese.
Did another whois, privacy. Another, 852-2222-2222. Some have 8888 and some have 2222.
Some have different admin emails.
None have a correct address.
I would say be weary and ask for proof of ownership.