The Chan ahan jingis a translation of the Dirgha Agama done in the fifth century, and was intended to bridge the early Buddhist teachings with the Mahayana Buddhist teachings and scriptures. This is the first in a series of volumes translating The Canonical Book of the Buddha's Lengthy Discourses (Taisho 1). Volume 1 contains sutras 1-10 (of 30). Translations of the remaining sutras will be published in two subsequent volumes.