Yangchow has long been a famous city in the history of China. The K'anghsi-hsi and Ch'ien-lung emperors of the Ch'ing dynasty made a total of twelve visits that had a profound political, economic, and cultural impact on this ancient city. First, their intensive visits helped to elevate the appearance of the city, especially in terms of landscaping and the construction of gardens. Their visits also served to stimulate culture and art, which led to Yangchow becoming an important cultural center at the time. Second, the enormous expenses for construction, road repairs, theaters, banquets, and rare curios created huge deficits for the mandarins as well as merchants of the city. Third, the emperors rewarded local officials and salt merchants with political and financial favors that in turn encouraged corruption and favoritism, and thus undermining the salt distribution bureaucracy. Fourth, the emperors' lavish lifestyle created a negative example for the local subjects, who adopted the attitude of seeking profit and living in luxury. In conclusion, visits by the Manchu emperors promoted economic development, cultural prosperity, and popularity of the ancient city of Yangchow, but they also eroded its original simplicity and reservation.