What kind of vessel is the shell container unearthed from the tomb of Shizhai Mountain in Jinning?

Shellfish container is a round copper box for shellfish, which was unearthed in ancient tombs of Yunnan people. Small figures are welded on the box cover, some are sacrificial scenes, some are scenes of fighting or slaves working under the supervision of slave owners, and some are long-horned bison herds. These figures and animals are all round carvings, welded to the lid one by one. For example, the commander rode a Mercedes-Benz horse and commanded a team of various weapons to kill the enemy. On the circular cover with a diameter of only 30 cm, there are people running horses with different dynamics, and the scene is warm, as if hearing the sound of people and horses robbing and killing. In another childbirth scene, there is a woman sitting on a stick. Judging from her dress, it seems that she is not a slave, but a slave owner. In this way, the raised stick should be a weapon used to fight slaves. Judging from the modeling technology of this figure sculpture, it looks as neat and meticulous as the contemporary figurines in the Central Plains.