By the time Ennin returned to Japan, Bogo JANG had already been assassinated but Jang's subordinate Commander Chang Yung made great efforts to realize Ennin's return.
円仁の日本帰国時には張保皐自身はすでに暗殺されていたが、麾下の将張詠が円仁の帰国実現に尽力した。