As early as when the Qing army entered the customs, there was a mass slaughter of Jiangnan people who resisted tenaciously, so the anti-Qing sentiment in Jiangnan was particularly high. Since Kangxi, the rulers of the Qing Dynasty have taken various measures to govern Jiangnan. Kangxi visited Jiangnan six times, so Emperor Qianlong, who was bent on imitating Kangxi, also visited Jiangnan six times. Like his grandfather, the first two times ended in Hangzhou.
Jiangnan, formerly known as wuyue, is one of the birthplaces of Chinese civilization. Although the population in Jiangsu and Zhejiang is small, it covers a large area. Since ancient times, it has been a famous land of abundance, which occupies an important position in both economy and humanities in the country. Silk and tea produced in Jiangnan have always been high-grade necessities inside and outside the court.
Jiangsu and Zhejiang are the most culturally developed areas in China, where there are many talented scholars. Over the years, the talents here are dozens of times higher than those in other provinces and cities. On the other hand, Zhejiang and Jiangsu were the centers of adherents' activities in the late Ming Dynasty, and their anti-Qing thoughts, words and deeds were also constant. Without the huge property income of Zhejiang and Jiangsu provinces and the support of gentry, the rule of the Qing Dynasty would be extremely difficult. Firmly controlling Jiangsu and Zhejiang, and making full use of the human, material and financial resources around Jiangsu and Zhejiang to develop the "prosperous times" in the Qianlong period have also become the fundamental reasons for Qianlong's six expeditions to the south of the Yangtze River.