Introduction to Ruyi Lake Pavilion: It is built on the west bank of Ruyi Lake, facing Huanbi across the water, hence the name Ruyi Lake Pavilion. This is a "ten" shaped pavilion, designated as the fourth scene by Qianlong. Standing in the pavilion and looking at the scenery of the lake, it is really like "the smoke and waves are all picturesque, and the intention is leisurely in Xingming".