20 10 From May to September, due to the reconstruction and expansion of the Tong (Liao)-Huo (He Lin) railway, the Inner Mongolia Institute of Cultural Relics and Archaeology and Tongliao Zhongqi Cultural Relics Management Office formed a joint archaeological team, led by the Inner Mongolia Institute of Cultural Relics and Archaeology, to investigate the cultural relics along the railway, during which the nearby Hamin site was discovered. In view of the worrying preservation status of the site, the Inner Mongolia Institute of Cultural Relics and Archaeology quickly reported it to National Cultural Heritage Administration, and after approval, it conducted a local rescue archaeological excavation of the site. In 20 1 1 year, the Inner Mongolia Institute of Cultural Relics and Archaeology and the Frontier Archaeological Research Center of Jilin University conducted a large-scale planned scientific archaeological excavation of the Hamin site.

2011June-11October, led by Professor Zhu Yonggang, and 12 graduate students participated in the excavation. The excavation area of the site is more than 3,000 square meters, and 29 houses, ash pits 10, 3 tombs and moats 1 0 have been cleared, and nearly 1,000 relics such as pottery, stone tools, bones, horns and mussels have been unearthed.

The houses cleared by archaeological excavations in 20 15 are arranged in rows, with uniform rules, a "convex" shape on the plane, and a semi-crypt shape, with the door opening facing southeast. The houses are about 3 to 5 meters apart. The site area ranges from 8 square meters to 20 square meters, and the living area is well preserved. The round pit furnace is located in the middle of the room, facing the door. In addition, a tomb was found, in which only a few mussels were found, and there were no other funerary objects. The unearthed pottery is mainly fine sand pottery and a small amount of muddy pottery. There are inclined straight-walled cylindrical cans, small mouths, double-shouldered cans, open arc-walled shallow-bellied cans, open inclined-walled flat-bottomed cans, rare spinning wheels, oblique mouthpieces and "ya-shaped" cans. Unearthed stone tools include millstones, grinding rods, cakes, axes, hammers, hammers, chopping tools, rings, arrows, leaves and so on. In addition, a precious Sanhe jade was unearthed.