 He then translated this new material, together with still further material purportedly belonging to the extended Nirvāṇa Sūtra, which had been handed to him by an anonymous visiting foreign monk, "as if it were expected" as the biographies note with apparent incredulity.This renewed work resulted in the current version of forty "juan" found in the Chinese canon.After negotiations had dragged on for several years, the pressure from Tuoba Tao became impossible to ignore—he was even threatening to invade Northern Liang to take Dharmakṣema by force.