1. Department of Pharmaceutics, School of Pharmacy, Ningxia Medical University, No.1160 Shengli South Street, Yinchuan 750004, P. R. China
2. Shaanxi Chinese Medicine Institute (Shaanxi Pharmaceutical Information Center), No.16 Biyuan West Road, Xianyang 712000, P. R. China
3. Department of Preparation Center, General Hospital of Ningxia Medical University, No.804 Shengli South Street ,Yinchuan 750004, P. R. China