Introduction to the joint tomb of King Yao’s parents: The joint tomb of King Yao’s parents is located on the upper left side behind the tomb of King Yao. The pine and cypress trees in the cemetery are green, the environment is elegant and solemn. During the Qingming Festival, people from hundreds of miles around come here to visit graves, burn incense and paper. People use this ancient form to express their deep remembrance of the King of Medicine.