Study on the economic geography of American cereal crops since the Ming and Qing dynasties Study on the satirical fiction in the Ming and Qing dynasties Research on agricultural geography in Huizhou prefecture since the Ming and Qing dynasties Study on the development of Zhongyuan towns during the Ming and Qing Dynasties Studies on the relationship of rgyalrong Tibetan chieftains during the Ming and Qing dynasties Study on the opera troupe of family in Mingand Qing dynasties Study of the construction of womens image in Pearl River Delta in Ming and Qing dynasties Study on the Zhaibao in Sichuan Province during Ming and Qing dynasties Study on the calligraphy theories and the calligraphers in the late Qing Dynasty Study on the legalization of ethnic policies in the Qing dynasty