Shijiazhuang Yesheng Chemical Technology Co., Ltd (hereinafter referred to Yesheng), located in Xinji, is a professional Chemical company engaged in chemical products’ researching & developing, manufacturing and marketing. Yesheng is a leading high technology enterprise, which has introduced the latest advanced technology and equipment and professional personnel in the industry to produce aroma compounds including (2-Propenyl) 3-oxobutanoate （CAS：1118-84-9,Quinoxaline（CAS ：91-19-0）,2-Methylquinoxaline （CAS：7251-61-8）and so on, widely used in foods, daily used chemicals,tobaccos and the preparation of aromas. In addition, Yesheng also has its own dependent R & D center, as well as gas chromatography, liquid chromatography and other advanced facilities.Our team is made up..