Annotations on “The Treatise on the Middle Way,” The [中観論疏] (Chin Chung-kuan-lun-shu; Chūganron-sho): A commentary by Chi-tsang (549–623) on Nāgārjuna’s Treatise on the Middle Way. Chi-tsang systematized the doctrines of the Three Treatises (San-lun) school in China. This work was widely studied in China and Japan, and many subcommentaries on it were produced. It is regarded as one of the fundamental works of the Three Treatises school.