Guifeng Zongmi (圭峰宗密, धर्मगुप्त - Dharmagupta; ཀུའེ་ཧྥེང་ཙུང་མི། ku'e pheng tsung mi Kuepeng Tsungmi, universally revered across China, Korea, and Japan as Dinghui Chanshi - 定慧禪師, Chan Master of Concentration and Wisdom), acclaimed throughout East Asian Buddhist history as the Fifth Patriarch of the Huayan (Avatamsaka) school and a fifth-generation Dharma heir in the Heze lineage of Southern Chan Buddhism, stands as one of the most brilliant 9th century synthesizers of scholastic philosophy and meditative contemplation in the Chinese Tripitaka. With his year of birth in 780 and his year of death in 841, Guifeng Zongmi was born into the prominent He clan in Xichong in Sichuan province, China. Receiving an intensive classical Confucian education throughout his youth in preparation for the imperial civil service examinations, Guifeng Zongmi experienced a profound spiritual turning point in 804 at the age of twenty-four when he met the eminent Heze Chan master Suizhou Daoyuan, recognized the pervasive reality of anicca and dukkha in worldly ambition, practiced fearless renunciation, took formal refuge in the Buddha, the Dharma, and the Sangha, and entered the monastic order.
Receiving full monastic ordination in the Dharmaguptaka Vinaya Pitaka lineage while upholding strict monastic precepts and ethical conduct, Guifeng Zongmi engaged in intensive meditation, mindfulness, and single-pointed concentration under Suizhou Daoyuan, experiencing a decisive initial awakening while reading the Sutra of Perfect Enlightenment (圓覺經, Yuanjue Jing, Taisho Number 842 in the Chinese Tripitaka). Determined to ground his meditative experience in the deepest scriptural and philosophical architecture of the Mahayana, Guifeng Zongmi journeyed northward in 810 to Luoyang and Chang'an, where he read Chengguan's monumental commentary on the Avatamsaka Sutra (Taisho Number 279 and Toh Number 44 in the Tibetan Tripitaka), exchanged deeply moving letters with the aged Fourth Patriarch Chengguan (738–839), and formally became Chengguan's foremost disciple in 812.
Studying tirelessly under Chengguan in Chang'an while also engaging in deep solitary retreats at Caotang Monastery on Mount Guifeng (Peak of the Jade Tablet) in the Zhongnan Mountains, Guifeng Zongmi mastered the complete exoteric Tripitaka, Abhidharma, Madhyamaka dialectics, Yogacara phenomenology, and the Huayan metaphysics of the Fourfold Dharma-Realm (Si Fajie). At the same time, he maintained warm friendships with leading Tang dynasty literati and statesmen—most notably the celebrated poet Bai Juyi (772–846) and Prime Minister Pei Xiu (791–864)—and was honored at the Tang imperial court by Emperor Wenzong of Tang, who bestowed upon him the purple monastic robe and the title Great Virtuous One (Dade).
Literarily, Guifeng Zongmi composed an extraordinary corpus of over ninety fascicles preserved in the Chinese Tripitaka that exercised a decisive influence upon Chinese, Korean, and Japanese Buddhism—most notably shaping the great Korean Seon reformer Jinul (1158–1210). Among his supreme masterpieces are the Yuanjue Jing Dashu (圓覺經大疏, Great Commentary on the Sutra of Perfect Enlightenment) and its sub-commentary; the Chanyuan Zhuquanji Duxu (禪源諸詮集都序, Preface to the Collected Writings on the Source of Chan, Taisho Number 2015), the earliest comprehensive historical and doctrinal taxonomy of all early Chan schools; the Zhonghua Chuanxindi Chanmen Shizi Chengxi Tu (Chart of the Master-Disciple Succession of the Chan Gate that Transmits the Mind-Ground in China); and the Yuanren Lun (原人論, Inquiry into the Origin of Humanity, Taisho Number 1886).
Philosophically, Guifeng Zongmi championed the celebrated doctrine of the Correspondence of Chan and Scriptural Teachings (Jiaochan Yizhi, 教禪一致), demonstrating that the direct mind-to-mind transmission of Bodhidharma and Huineng and the grand doctrinal systems of Huayan and Yogacara are two inseparable expressions of the exact same non-dual truth. In his Inquiry into the Origin of Humanity, Guifeng Zongmi systematically evaluated Confucianism, Daoism, early Shravaka teachings on karma and rebirth across the six realms, Yogacara consciousness-only phenomenology, and Madhyamaka dialectics on emptiness (शून्यता - śūnyatā; སྟོང་པ་ཉིད། stong pa nyid Tongpanyid), culminating in the supreme revelation of innate Buddha-nature (tathagatagarbha) taught in the Mahaparinirvana Sutra (Taisho Number 374 and Toh Number 119), Maitreya's Uttaratantra Shastra (Toh Number 4024 and Taisho Number 1611), and the Awakening of Faith in the Mahayana (Taisho Number 1666).
Contemplatively, Guifeng Zongmi articulated the famous formula of Sudden Awakening Followed by Gradual Cultivation (Dunwu Jianxiu, 頓悟漸修), explaining that while a practitioner may suddenly recognize their primordially pure, luminous Buddha-nature in an instant of piercing right view, they must still engage in patient, gradual cultivation through mindfulness, meditation, and non-attachment to dissolve deeply ingrained habitual tendencies, attachment to the five aggregates, anatta, and emptiness of self, and the three poisons of greed, hatred, and delusion.
Throughout his teaching career between Mount Guifeng and Chang'an, Guifeng Zongmi insisted that lofty non-dual realization must always manifest in strict adherence to Shakyamuni Buddha's foundational teachings on the Four Noble Truths, the Noble Eightfold Path, generosity, merit, loving-kindness, compassion, equanimity, skillful means, and universal bodhicitta, demonstrating remarkable moral courage even when sheltering persecuted imperial officials during the Sweet Dew Incident of 835 at the risk of his own life.
Passing into final parinirvana at Xingfu Monastery in Chang'an in 841 at the age of sixty-one—just four years before the devastating Huichang Persecution of Buddhism under Emperor Wuzong of Tang—Guifeng Zongmi was cremated at Mount Guifeng amidst extraordinary auspicious signs and self-arisen sacred relics, with his memorial stele composed by Prime Minister Pei Xiu. Revered across East Asia as the Fifth Patriarch of Huayan and a towering bridge between doctrinal study and direct contemplative realization, Guifeng Zongmi stands forever alongside Nagarjuna, Asanga, Fazang, Chengguan, and Jinul as a supreme guardian of the Middle Way.