Treatise on the Profundity of the Lotus Sutra, The [法華玄論] (Chin Fa-hua-hsüan-lun; Hokke-genron): A commentary on the Lotus Sutra by Chi-tsang (549–623), a systematizer of the doctrines of the Three Treatises (San-lun) school in China, written from the viewpoint of that school. In this work, Chi-tsang draws on many sutras and treatises, such as the Flower Garland Sutra, the Nirvana Sutra, and The Treatise on the Great Perfection of Wisdom, and introduces the content of these texts as well as his and other scholars’ views on the Lotus Sutra. The work is regarded as an important reference on interpretations of the Lotus Sutra and other works by Chinese scholars.