 Searching to identify the occupants of the tombs, archaeologists consulted the "Commentary on the Water Classic", which includes a description of two tombs located on the southern bank of the Sui River.The text describes two tombs surrounded by a wall and including a shrine, two stone towers, animal and human stone guardian figures.It identifies the occupants of M1 as Zhang Boya, Governor of Hongnong Commandery, and his wife.