Biographies of the Northern Qi and Sui dynasty Dilun master Lingyu and the Sanjie jiao movement’s Xinxing are found in the Xu gaoseng zhuan as well as in two separate stone inscriptions. The age of death of Lingyu and Xinxing found in the latter are one year greater than those found in the former. It has already become clear based on Dunhuang manuscript S.2137 that the older death age of Xinxing is correct. In the case of Lingyu, if one follows the Xu gaoseng zhuan’s age at death, problems arise regarding the time he met his patron Lou Rui. Since Lingyu was invited via Emperor Wen of Sui’s imperial decree at the age of seventy-four, it is reasonable to place his date of death in Kaihuang 10 (590). Therefore, Lingyu’s age at death in the Xu gaoseng zhuan is also incorrect: it is 89 years old, not 88.