《三国志·蜀书·后主传》
按照礼节，国君继位，到第二年更改年号，而章武三年，就改变为建兴年号，考察古来的义理，实在是有违礼法。
礼，国君继体，逾年改元，而章武之三年，则革称建兴，考之古义，体理为违。
According to the etiquette, when the monarch succeeds to the throne, the reign title will be changed in the second year, but in the third year of Zhangwu, it was changed to Jianxing's reign title. According to the ancient principles, it is indeed against the etiquette.