Study of the changes in the ritual system of the northern Wei dynasty 并列题名：Study of the changes in the ritual system of the northern Wei dynasty Study on the statues chirography of the Northern dynasty Study of the ethical criticism of the Western Zhou dynasty Study on the four-ritual system in the Song Dynasty Study of the eunuch system of the Ming Dynasty 并列题名：Study on the statues chirography of the Northern dynasty On the Pin-shi system of the Southern-Song dynasty Study on the marching system of the Tang Dynasty a study of the tectual research in the Southern Sung dynasty