Discussion on the history of poetic thoughts in the Northern Song dynasty 并列题名：Discussion on the history of poetic thoughts in the Northern Song dynasty a study on Wuzi's theory of one body in the Northern Song Dynasty Study on the history of foreign trade during the Qing dynasty Research on the prefaces in the Northern Song dynasty Study on the history of Ci in the Ming Dynasty a study centered on the history of Wenzhou in the Qing dynasty Brief history of Kaifeng city in the earlier Song dynasty Impression on parliament of the envoys in the late Qing dynasty 并列题名：Brief history of Kaifeng city in the earlier Song dynasty