CSPC API Division(Vitamin C, Vitamin B12,Caffeine,Acarbose, dextrose, and their Series Products )ADD.:No.236 Huanghe Street, Shijiazhuang, China. We’re the largest and most profesional Vitamin C and Caffeine anhydrous manufacturer and supplier in the world.We’re the earlist and most professional manufacturer of Dextrose anhydrous in China.We’re the most professional manufacturer of Vitamin B12 and Acarbose in China.We’re the only enterprise supplies Cobamamide in China.