In the Tang Dynasty, Lu Yuanqing wrote the "Tomb of Du lonely Shiheng", the full name of which is "Tang Dynasty Sandafu Inspection Prince Zhongyun and Dianzhong Shi Dugu Cemetery Inscription and Sequence", 60 centimeters in length and width, 23 lines, and 28 characters in the line, unearthed in Xi'an, Shaanxi.