I enjoy Dekang liquids on a regular basis and have notice no ill effects, I trust the Dekang brand because of it's established history and high end manufacturing facilities.
that being said...
I have tried some generic Chinese liquids that I wouldn't put in my cars radiator, just awful stuff with no hint to ingredients, manufacturing source or methods.
Basically it should be good if it's a well established brand name that prides itself and has public videos available showing it's methods and plant conditions.