a case study of the Chao family in the Song dynasty 家族文学史的建构：宋代晁氏家族文学研究：a case study of the Chao family in the Song dynasty a case study of the coal industry Study on the Han family form in Jin dynasty a case study of the reform in Beijing Historical study of Confucian scholarship in the Song dynasty a case study of the ethnic conflict in Southern Kyrgyzstan a case study of the city of phoenix History of the songs in the Zhou dynasty a case study of the cotton supply chain of Northern Xinjiang