Study on the changes of the political order between China and Korea in the rise period of the Qing Dynasty Study on the changes of political relations between China and Choson in the Late-Yuan and Early-Ming period Study on treaty relations between China and other countries during late Qing Dynasty Study on the fiscal thought in the late period of Qing Dynasty Study of relationship between historical events and literature in the Yongle period of the Ming dynasty Study on the chief cabinet minister Liu Jian during Hong Zhi and Zheng De Periods in the Ming Dynasty Study on the relationship between painting and epigraphy in the Qing Dynasty Study of the thought of coast defence and sea power in the Late Qing Dynasty Study of the water of the Wutai Mountain area during the Qing Dynasty Study on the garrison town in the eastern Tianshan Corridor of the Tang dynasty