 Performance and participation in officially sanctioned rites, which were initiated by the Eastern Han, were the great leveling agent unifying the various populations of the Han empire.It is the construction of mortuary architecture on a level plain that allowed the living members of the Han mortuary audience, in their ritual conditions, to enter the structure for performance of ritual at the tomb.Within the tomb, it was the doors and doorways of the tombs that regulated the pattern and format of the rituals.