Manufacture optical brighteners, basic dyes and their intermediates used in plastics. such as PVC,PP,PE,ABS,EVA etc. paint, printing ink,pigment.and the product list as follows:Optical brightener OB(C.I.184),OB-1(C.I.393),FP-127(C.I.378),KCB(C.I.367),ER-1(C.I.199),ER-II(C.I.199:1),CBS(C.I.351),KSN(C.I.368)BASIC RED 1,BASIC RED 1:1; BASIC VIOLET 11,BASIC VIOLET 11:1,Thiophene-2,5-dicarboxyl acid;4-4'-bischloromethyl biphenyl simply called:BCMP;4-4'-bis(diethyloxphosponomethy)diphenyl