Geshu Han
In 750, he left the court to join the military governorship of General Geshu Han of the Tang dynasty, for whom he conducted large-scale tantric initiations at his field headquarters. In 754, he translated the first portion of the Tattvasaṃgraha Tantra texts (Taishō Tripiṭaka. 865), central to the Outer Tantras of Vajrayana Buddhism, which became one of his most significant accomplishments. He regarded its teachings as the most effective method for attaining enlightenment yet devised, and incorporated its basic schema in a number of writings.