Liu Degong had made three trips to China, and written three records of Journey to Yan. The first record was written when he was sent to Shenyang as an envoy in 1789, which was Record of Luanyang (also named Travel Notes on Yilou), however, the text of which had been lost. In 1790, he was sent to China for the second time with Piao Qijia, and during this visit, he communicated with more than 40 Chinese literaties. Afterwards, he had written Poems and Notes on Jounery to Rehe. The last visit he had made as an envoy was taken place in 1801 with Piao Qijia. In-depth exchanges had been conducted with more than 40 Chinese literaties. He had written Another Journey to Yantai. The experiences of these three missionaries enabled Liu Degong to have a preliminary understanding of the political and cultural situation in East Asia. In the eyes of the North Korean literaties, China had finally split into two that were no longer overlapped, one of which was historical and the other was realistic, the Qing dynasty. They followed the former culturally and surrender politically to the latter. But after three trips to China, Liu Degong had seen that the historical China was drifting away with the increasingly declining style of its study and was also going to collapse in the turmoil in reality. Through these questions, he imagined that “North Korea”, which was not submerged in the cultural community but classified as a cultural community. It has shown the cultural consciousness of intellectuals in the modern transitional period. This article uses his two narrative works based on his Chinese experiences to trace back the Korean literati's understanding of China in the 18th century, and their gradual separation from “East-Asian civilization common circle” thinking of the Middle Ages, the process of building their modern “imaginary community” such as building their own countries and nations.