Introduction to Room No. 2 Site: Room No. 2 Site was a place for gatherings, discussions, and public labor among matrilineal clan members in primitive society. It was excavated in 1978 and covers an area of ​​about 95.64 square meters. It is supported by 50 columns. . The large pit in the middle, which is oval in shape, is the large chamber used by primitive people. There is also a cave perpendicular to the ground in the northwest corner, containing pottery, and a piece of burned earth in the southwest corner is the garbage dumped by primitive people.