Lyu Geum ..., a retinue officer of the Choson emissary sent to the Qing court in Beijing in 1777, brought along a copy of the Hanke jinyan ji ..., a collection of poems of four young Choson poets compiled by himself, and presented it to Li Tiaoyuan ... and Pan Tingyun ..., two eminent Qing poets of that time. They gave high marks to the four poets' achievements and wrote prefaces for the book. This was a very significant event in the history of Sino-Korean cultural contacts during the Qing dynasty. Firstly, these four poets' stature was elevated in Korea because the Qing poets gave them high marks, and they became known as the "Four Poets." Secondly, from then on, Choson poets Lee Deokmu ... Park Jega ..., and Lyu Deokong ... wrote letters and kept close contacts with Li Tiaoyuan and Pan Tingjun; later, they met with each other in Beijing several times. Thirdly, after they returned to Korea, they advocated that Choson should learn from Qing China and initiate political reform; hence, they became the backbone of the Choson Bukka School. [ABSTRACT FROM AUTHOR]