Korean, not Chinese.
Hyosung was the actual manufacturer of Suzuki SV650's. For the money, their products are not at all bad.
I had a Hyosung dealer tell me that they were the original builder, for Suzuki, of the SV650 engine. I'm not sure if that is correct or not. For the record, I had and SV, it was a really fun bike to ride. Did wheelies like you wouldn't believe. Even easier than the S4.