Jia Dao (779～843), a poet of the Tang Dynasty. Han nationality. The word Lang (Lang) Xian. A native of Fanyang County, Youzhou, Hebei Province (now Zhuozhou City, Hebei Province) in the Tang Dynasty. In his early years, he became a monk with no original title. In the winter of the fifth year of Yuanhe (810), I arrived in Chang'an and met Zhang Ji. In the spring of the following year, he went to Luoyang and paid a visit to Han Yu. He was deeply appreciated for his poems. Later, he returned to secular life and was repeatedly cited as a Jinshi. During the reign of Emperor Wenzong, he was demoted as the chief clerk of Changjiang (now Pengxi, Sichuan) due to slander. He once wrote the poem "Sick Cicada" and "To stab the minister" ("Chronicle of Tang Poems"). In the fifth year of Kaicheng's reign (840), he moved to Sicang, Puzhou to join the army. Wuzong died in Puzhou in the third year of Huichang (843). Jia Dao's poetry formed a genre in the late Tang Dynasty and had a great influence. In the Tang Dynasty, Zhang Wei was listed as one of the seven people who were promoted to the hall with "Qingqi, Yazheng" in "Poet's Host and Guest Picture". Li Huaimin's "Host and Guest Picture of Poets in the Middle and Late Tang Dynasty" of the Qing Dynasty called him "a strange and remote suffering master", and listed many of his "house-in-house" and "door-to-door" disciples. Li Dong of the late Tang Dynasty, Sun Sheng of the Five Dynasties and others respected Jia Dao very much, and even burned incense and worshiped his portraits and collections of poems, as if they were gods ("The Biography of the Talented Scholars of the Tang Dynasty", "Junzhai Study Chronicles"). Jia Dao is the author of 10 volumes of "Yangtze River Collection", and there is a photocopied Ming Dynasty version of "Sibu Congkan" in Song Dynasty. Li Jiayan's "New School of Yangtze River Collection" uses Jia's poems collected in "Complete Poems of the Tang Dynasty" as the base, with reference to separate editions and related collections and anthologies, as well as the appendices "Jia Dao Chronicle", "Jia Dao Friendship Test" and the compiled Jia Dao The island poetry review is relatively complete.