Profound Meaning of the Four Mahayana Treatises, The [大乗四論玄義] (Chin Ta-ch’eng-ssu-lun-hsüan-i; Daijō-shiron-gengi): A work by Hui-chün, also known as Chün-cheng, of the early T’ang dynasty (618–907) in China. The four Mahayana treatises are The Treatise on the Middle Way, The One-Hundred-Verse Treatise, The Treatise on the Twelve Gates, and The Treatise on the Great Perfection of Wisdom. This text explains the doctrine of the Three Treatises (Chin San-lun; Sanron) school and attempts to refute that of the Establishment of Truth (Ch’eng-shih; Jōjitsu) school and the Summary of the Mahayana (She-lun; Shōron) school.