Analysis was carried out on an Agilent 1100 series HPLC system (Agilent Corporation, Germany) consisting of a G1315B Diode Array Detector (DAD), a G1311A low-pressure quatpump, a G1379A online degasser, a G1316A thermostat column compart- ment and a G1313A automatic sample injector. The YF-20 Donghua automatic decocting machine, YBS250E liquid packing machine and YBS liquid packing machine were all obtained from Beijing Donghuayuan Medical Equipment Co., Ltd.