Tiantai Sect is called pure, round and unique because of its wonderful difference between Fahua and 2000, which is a pure and strange taste. The so-called "two thousand" means that Tiantai Sect has always called the first four seasons "two thousand" in the judgment of the May Eighth Religion, which means that the Buddha declared that the critical eye was before the first four seasons. Tiantai Sect believes that among the four religions in the first four seasons, "Hua Yan Shi" is different in the circle, while "Luyuan Shi" talks about Hinayana (only), while "Fang Isochronous" is widely used to talk about the four religions, "Prajna Shi" and "Yuan Er Shi". Judging by the so-called "combination, Dan, right, and belt", thick and wonderful, then Hua Yan is thick and wonderful, Luyuan is thick and wonderful, Fang San is thick and wonderful, and Prajna is thick and wonderful. Therefore, the circle teaching mentioned above is rough and wonderful, not pure and wonderful; However, the circular teaching mentioned in the fifth book "Law and Petrochemical" is pure and wonderful. Therefore, the first four flavors of Hokkekyo's "harmony, Dan, righteousness, and belt" are strong, showing the beauty of a Buddha taking a net circle in order to achieve the meaning of a net circle. [Fahua Xuanyi Interpretation and Signing Volume I, Teaching Concept Outline Volume I (Xu Zhi), Tiantai Four Teaching Instruments (Dignity Concept)] P4278