Shenzhen Sungening BIO-Technology Co.,Ltd.(Brand Name:SG) specialized in the manufacturing and supplying with kinds of Chinese herbal reference substance and herbal extracts.We are the largest Professional Standard Reference Supplier in South China,with the partner of world famous chemical standard substance company such as LGC,The British Pharmacopocia, CHROMOGENIX,Sigma-Aldrich etc.We earned a long-lasting good reputation due to the excellent quality, the competitive price and the good after-sales service.