Comparative study on extraction method of Zuojin Pills Comparative study on extraction method of Zuojin Pills Pharmaceutical formulation of intra-gastric floating sustained-release tablet of Zuojin Pills Study on efficacy of Liujunzi decoction combined with Zuojin pills in treating acute radioactive duodenitis and their mechanism Advance in modern studies on compatibility of Coptidis Rhizoma and Evodiae Fructus