Profound Meaning of the Three Treatises, The ［三論玄義］ (Chin San-lun-hsüan-i; Sanron-gengi): A work written around 597 by Chi-tsang, a systematizer of the doctrines of the Three Treatises (San-lun) school in China. This work explains the teachings of the three basic treatises of the school—The Treatise on the Middle Way, The Treatise on the Twelve Gates, and The One-Hundred-Verse Treatise. The first two treatises are works by Nāgārjuna (c. 150–250), and the third is the work of his disciple Āryadeva. Kumārajīva translated all three of these texts into Chinese in the beginning of the fifth century. The Profound Meaning of the Three Treatises, which discusses the principles of non-substantiality and the Middle Way, is known for its clear and concise explanation of the doctrinal system of the Three Treatises school. In Japan, this work was highly regarded, and many commentaries on it were produced.