A Study of the Hui Nationality in the Yuan Dynasty 并列题名：A Study of the Hui Nationality in the Yuan Dynasty a case study of the Chao family in the Song dynasty a study of the Western Regions during the Tang Dynasty Study of the imperial examination system in the Tang dynasty Study of urban security in the Han dynasty a study on the Jia rituals during the Song Dynasty a study on the region of Sanhe in Qin and Han dynasty 并列题名：Study of the imperial examination system in the Tang dynasty a study of confucianism in the early Han dynasty