Tianjin Yadong Group is one of the biggest dyes and dyestuff intermediates manufacturers in Chinese North District. 4 companies of Yadong Group are that :Tianjin Yadong Chem Co Neimenggu Xinya Chem Co Wuhai Heimiao-Yadong Chem Co,Tianjin Yadong Longxin International LTD is the selling and purchasing Co.We are the stable supplier of BASF Germany from 2004, with more than 25 years developing, our products have been widely recognized in foreign and domestic market.