In the three hundred years of relations between the Qing and Choson dynasties, Chinese merchant ships drifted to Choson Korea several times. However, of all of these, Lin Yinguan's 林寅觀 boat of 95 people drifting from Taiwan in 1667 had one of the biggest impacts on Choson politics. Lin Yinguan and his ninety followers, as the official merchants of Koxinga's (Zheng Chenggong 鄭成功) regime in Taiwan, were swept off-course by a wild storm to Jeju 濟州 Island on their way to Nagasaki in May 1667. People in Choson Korea were shocked by the appearance of the 95 persons, all of who had long hair in the Ming style, wore Ming-era clothing, and carried the Southern Ming Emperor Yongli's 永曆 almanac. Thus, for the first time Choson people saw evidence that the Southern Ming dynasty was real. There were two separate opinions among the Choson ministers, who debated about what to do with the 95 merchants: some ministers indicated that the merchants should be sent to Japan or Taiwan because of a pro-Ming/anti-Qing sentiment; the others advocated from a realistic perspective that they should be sent to Beijing. At last, the second opinion was adopted and the merchants were sent to Beijing and were executed. When the Choson King and ministers heard this news, they were so overtaken with self-condemnation that ministers during the subsequent years wrote many poems and articles to memorialize them, and King Jeonjo 正祖 (1776-1800) built an altar to sacrifice to them. This article focuses on the above issues in order to analyze their profound historical and cultural background, as well as Choson's different attitudes toward the Ming and Qing dynasties.