CUSTOMIZED LAB Chemtn Biological Technology Limited is one of the leading RC chemicals producer in china,we have advanced equipment and high technology, we have 5 leading chemists for our production,our products sell both locally and abroad. In local, we have big buyers in shanghai,Shenzhen,Hubei,And our local Hebei. 80% of the small traders for these kinds of products get goods from us. In foreign countries, USA,UK,France and other european countries are our main big...