Buddhism has been introduced to Vietnam for almost two milleniums. It has witnessed the highs and lows of the country, accompanying Vietnamese people with compassionate ideology, kindness and wisdom, which made Buddhism indispensable in the people’s daily life. The religion itself and its monks also made certain contributions to the country's development and security. Therefore, Buddhism has been used by various generations of feudal regime as a means of public order. Zen in Vietnam reached its peak in Lý and Trần dynasties (1009-1400). During this period, Zen displayed characteristics of “Emperor Zen” and “Entrance to the World.” The Bamboo Forest Zen School (Thiền phái Trúc Lâm) advocates "dual practice of Zen", interpretation of the scriptures, laws, and quotations, especially the establishment of a unified and solid Buddhist organization. During the Trịnh–Nguyễn Civil War (1600-1778), the Buddhism of Bắc Hà and Nam Hà were influenced by Linji and Cao Dong Zen from China, and the Yen Tu Bamboo Forest Zen School (Thiền phái Trúc Lâm Yên Tử) revived and developed again. Until the early Nguyễn Dynasty (1802-1858), it was the pinnacle of ancient Vietnamese development. In the early period of Nguyễn Dynasty, great importance was attached to pedagogical methods, and the combination of theory and practice was actively promoted to rapidly develop Chinese literature, and many talented people were trained. Vietnamese Buddhist Zen thought has always been based on the integration of Prajna and Buddhism, and it can be represented by "Lotus Sutra" and "Heart Sutra". From the 17th and 18th centuries, Vietnamese Buddhism has had developments of quotations, essays, and folk Buddhist literature. Master Minh Chanh was the 37th descendant of the Cao Dong Zen School in North Vietnam. He inherited the ideology of Zen in Vietnam and wrote the works of "Outline of Lotus Sutra" and "Pan Ruo Zhijie" based on the Zen ideology of Master Jiaoguang in Ming Dynasty. "Awakening of Faith in the Mahāyāna" and "Śūraṅgama Sūtra" are the theoretical foundations of Zen Master Minh Chanh. As for other works, such as "Lotus Sutra", "Avataṃsaka Sūtra" and "Heart Sutra", they are used to strengthen the ideological argument. "Pan Ruo Zhijie” is based on the one-hearted and two-door system in "Awakening of Faith in the Mahāyāna". The main content of the "Outline of Lotus Sutra" is that the "Lotus Sutra" and "Śūraṅgama Sūtra Zheng Mai" have the same purpose, that is, the former is to reveal enlightenment into "Buddha knowledge", while the latter is to reveal enlightenment into "true heart and permanent residence.” The stipulations are integrated into the framework of the “Lotus Sutra”, which is a method of emphasizing specific meditation. Along the way of "sudden enlightenment" and “while initiation, from the root of the eye; while practicing, from the root of the ear” one’s own Zen method is developed. Confidence is required to enter the Mahayana, from hearing
