It is said that the reason why Emperor Qianlong lingered in the misty rain building and wrote poems again and again began with the famous poet Du Mu in the Tang Dynasty. The influence of the wonderful poem "Four hundred and eighty halls in the southern dynasties, in the misty rain of many towers" in Jiangnan Spring Day.

Moreover, when Emperor Qianlong went to Jiaxing, he couldn't help but fall in love with the beautiful South Lake and the beautiful misty rain building, and wrote poems as a souvenir every time he went.

175 1, Emperor Qianlong began his first southern tour, starting from Beijing and arriving in Suzhou, from Wujiang to Jiaxing. When he passed Jiaxing, he lived in the camp in Beijiaochang, xiushui county, that is, the imperial garden opposite the Qingmen Mountain outside the north gate. Emperor Qianlong named to go to Yuyanlou.