Chu-san Yung-i (Abiding in the three and employing the one) is the function related to the Subtlety of Retinues. This is spoken of by Chih-i in terms of the disciples as the retinues formed by the subtle response of the dharntakāya. The disciples of the Three Vehicles (denoting abiding in the three vehicles) are actually the manifestation of the dharmakāya (denoting employing the one). (Vol. 2, Page 446)