Adhering to the principle of "quality first", we have established a complete quality control system, with an independent central laboratory, equipped with advanced and efficient testing equipment. Such as 1260 liquid chromatography(Agilent ), LC-20A liquid chromatography (Shimadzu), GC-2010plus column (Shimadzu), AA-7000 atomic absorption spectrophotometer (Shimadzu) , UV-2450 UV-visible spectrophotometer (Shimadzu) and other equipment to ensure high quality and stability of product quality.