Study of land taxes in Qin and Han dynasties Study of land tenure system in the Qin and Han Dynasties History of pre-qin,qin and han dynasties Study on Duan Li in Song and Yuan dynasties Study of appellation in the Qin and Han dynasties Study of maritime culture in the Qin and Han dynasties 并列题名：Study of land tenure system in the Qin and Han Dynasties the study of tsa-tzu in Ming and Qing dynasties History of pre-Qin, Qin and Han dynasties land tax in Tang and Song dynasties