It's all a scam
So far I have deleted the mails – I seem to remember that I wrote back once that I don't care what they do with borncity in China and was rather wondering how they pronounce the R in this name. When the above mail arrived in my inbox again, I spontaneously tried a short search for chinanameregistry and found it.
In
this article, someone warns companies against this fraudulent approach. The goal of these mails is to grab a domain registration from the victim at an increased price. The scam has been running for many years, there is even an entry
Domain name scams in the English Wikipedia.
But somehow the scammers still seem to be successful, otherwise the mails would not exist. One should ignore the mails and also not answer. To protect your business interests, you can register your domain name with a local registrar for different top-level domains (.de, .at, .ch, .eu, .org, .com).