Introduction to Lotte Tower: Lotte Tower was the place where Bai Juyi studied when he was the governor of Suzhou, so the building was named after him. The upstairs contains books such as Fan Zhongyan's "Yi Tian Ji" and "Ci Shan Jiu Lu Ji", so it is also called the library. During Qianlong's southern tour, he once climbed to the building to read ancient books, so it was also called Yushu Tower.