Saicho's idea of "Shishu Sosho" (literally, four types of inheritance of Buddhism: Tendai, Esoteric Buddhism, Zen and Daijo-kai [Mahayana precepts]) was allegedly influenced by the teachings of Gyokusen Tendai (the Tiantai [Tendai] group at the Gyokusen-ji Temple in Jingzhou) that Dosen had introduced.
最澄の「四種相承」（天台・密教・禅宗・大乗戒）の思想は、道璿が伝えた玉泉天台（荊州玉泉寺の天台）の影響とされる。