The layout and style of the Song tombs resemble those found in the contemporary Tangut kingdom of the Western Xia , which also had an auxiliary burial site associated with each tomb . At the center of each burial site is a truncated pyramidal tomb , each having once been guarded by a four @-@ walled enclosure with four centered gates and four corner towers . About 100 km ( 62 mi ) from Gongxian is the Baisha Tomb , which contain " elaborate facsimiles in brick of Chinese timber frame construction , from door lintels to pillars and pedestals to bracket sets , that adorn interior walls . " The Baisha Tomb have two large separate chambers with conical ceilings ; a large staircase lead down to the entrance doors of the subterranean tomb .