It is the biggest enterprise with its series of SULPHUR BLACK in the world.It is the biggest enterprise with its series of VAT PINK in the world.One of the 500 biggest chemical industry enterprises, the 20 biggest dyeing industry ones.It passed the ISO9001 quality system certification.It was made in 1960 and reformed to be a limited corporation company in 1997.It can produce six style dyes (including sulphur, vat, etc) and dyestuff intermediates, medicine intermediates which is up to over 80 kinds.Sulphur black marked Huanyu became the best brand name product in Shanxi province in 2001, 2003 and 2005.It owns the provincial class technical center and is furnished with the first class inspecting instrument.It owns the perfect environment protection and inspecting system.It owns the import and export power.It has office in Guangzhou, Shenzhen, Shanghai, Tianjin, Wuhan, Chengdu, and jinjiang.