Archaeologists unearthed 31 Han Dynasty (206 BC-AD 220) tombs in Horinger county, Hohhot, North China's Inner Mongolia autonomous region.

Based on the shape of the tombs as well as the pottery and coins they were found with, it can be inferred that they spanned approximately 200 years from the middle Western Han Dynasty (206 BC-AD 24) to the early Eastern Han Dynasty (25-220).

Many Han Dynasty relics have been found near the ancient Ming Dynasty (1368-1644) city of Dahongcheng, about 2 kilometers west of the tombs.

Experts have preliminarily inferred that the Han Dynasty city might be superimposed under Dahongcheng.

The recently-excavated tombs were found in close proximity to each other and are diverse in shape. They include earth pit vertical cave tombs, earth cave tombs, and brick wall tombs, all of which are small and medium-sized single-chamber tombs.

The unearthed burial objects include pottery, glazed pottery, bronze, iron, stone, wood, and shells, totaling more than 200 pieces.