Because the history books only record Li Yan jealous of Bian Xu's medical skills and killed Bian Xu, but no history books have recorded where Bian Xu was buried. In fact, Bian Xu practiced medicine everywhere, and his footprints were all over Jin, Yuan, Lu and Yu; So there are flattened tombs and temples in many places in the country, such as in Hebei Xingtai Neiqiu, Cangzhou , Henan Tangyin Fu Road, Zhengzhou, Shaanxi Linyi, Shanxi Yongji, Shandong Jinan and other places have flattened and flattened tombs. We went to the flattened temple in Tangyin County, Henan.