Study on the tributes and its system in Qing dynasty Study on the banishment system in Qing dynasty Study on the penalty of atonement system in Ming Dynasty Study on the noble titles system of Jin Dynasty Study on the state and local society in song dynasty Study of the imperial examination system in the Tang dynasty Study on the tax legal system in the Qing Dynasty Study on the change of Neiku and financial system of Ming dynasty Study on the society and politics of Jin and Song dynasty Study on the land tax system and related problems in Song dynasty