This is their website:
http

/www.sunsun-china.com/en/index.php
Personally, I'd stay away from the tanks (based on my experience) but would use things like their pumps and wavemakers etc. I've had a 12,000 L/H SunSun wavemaker for years and it is brilliant - at a fraction of the cost of more recognised brands. I'm sure plenty of people haven't had problems though, I'm just one person. It's just I would want to risk a disaster in my living room or worse, possible injury with another large SunSun tank.
ps. When I got my tank, the hood and cabinet was already scratched, plus the lights looked well dodgy (didn't have much of a problem with them though, just needed a gentle tap every now and again).