Xian dai xi fang zhe xue/. 2. Xian dai xi fang zhe xue/ Man you xi fang zhe xue/ Man you xi fang zhe xue = Xian dai xi fang mei xue si chao/ dang dai xi fang mei xue Hou xian dai xi fang she hui xue li lun/ Dian lu gong cheng xue/. 2. Hou xian dai xi fang she hui xue li lun = Wei dian zi xue/. 2.