Yan Zhenqing, in his literature Magu Shan Xiantan Ji (痲姑山仙墰記), wrote that on the high tops of Mount Magu could still be found the clam and oyster shells, and he also mentioned about the gardens and fields which once were under the water.
Yan Zhenqing, dalam tulisannya yang berjudul Magu Shan Xiantan Ji (痲姑山仙墰記) menyebutkan bahwa pada puncak-puncak tinggi di Gunung Magu masih juga ditemukan cangkang-cangkang kerang dan tiram serta menyinggung mengenai kebun dan lahan yang dulunya berada di dalam air.