A palace site of Qianlong Emperor on the Lone Mountain of West Lake. Built in 1751 and destroyed in 1861, it was later renamed Zhongshan Park in memory of Mr. Sun Yat-sen. Come in to see the site and know the bluestone Sumizu, Han Baiyuzu, and also have a long experience. There is a mountain behind, depicting the word "lone mountain", some children like to play, adults are generally not interested.