Studies on the population of the Northeast society of Qing dynasty 并列题名：Studies on the population of the Northeast society of Qing dynasty Study on the urban rural relations in the northern regions of the Qing dynasty Study on the state and local society in song dynasty Studies on the literary of Ming dynasty Study on the legalization of ethnic policies in the Qing dynasty studies on the tea books of Ming dynasty studies on the history of Chinese painting of the Ming Dynasty Studies on the history of the Qing dynasty Studies on the population of northeast China in the period of the puppet Manchukuo