《晋书·志·第十四章》
到杨珧任卫将军，兼任少傅，撤销詹事，于是推崇弘扬以傅训导的制度，任命太尉贾充兼太保，司空齐王司马攸兼太傅，设置的吏员属官都和原先一样。
及杨珧为卫将军，领少傅，省詹事，遂崇广傅训，命太尉贾充领太保，司空齐王攸领太傅，所置吏属复如旧。
When Yang Yao became General of the Guards and concurrently served as the Grand Mentor, the Zhanzhi position was abolished. Therefore, the system of training with mentors was promoted. The grand tutor Jia Chong was appointed as Taibao, and Sikong Qi Wang Sima You was concurrently appointed as Taifu. The official staff members were set up as before.