Reliable Chinese manufactures require that you know the ins and outs of doing business in China. I couldn’t suggest one as im simply not familiar with the manufactures there and frankly done have a brand name for you.
In any event I’m not one to buy junk hardware if I’m concerned about that much power. I’d get on DigiKey or Newark and buy a brand name I trust. Omron and Watlow, come to mind immediately but there are dozens of suppliers to choose from.