The Ricoh Tower, also known as the Lingyan Tower, is located on the Ricoh Rock at the mouth of the Longyan Dongkou, which was built to commemorate the ancestor of the Ricoh Kaishan. The monk Huili, the ancestor of Kaishan, was a West Indian monk. He traveled from Central Plains to Zhejiang in the Xianhe District in the East Jin Dynasty and went to Wulin (Hangzhou) Mountain. He saw a peak and sighed: "This is a small mountain of Zhongtianyu Guolingyu Mountain. I don't know why it flew here? Buddha is hidden in the world, and most of them are immortals." Mingxuan Lingyin