According to Dr. Cha Tal Man, head of an excavating party under the Archaeological Institute of the Academy of Social Sciences, recently discovered there were nine earthen tombs with stone chambers and lots of such relics as gold bell, silver bracelet, silver ring, coffin nails and pieces of earthenware belonging to the Koguryo Kingdom (B.C. 277-A.D. 668).

Tombs are distributed in wide area around Wolji-ri seat. Each earthen tomb has one stone chamber and the size of the chambers is 2.3-3.24 meters long and 1.4-2.15 meters wide.

Each of the tombs consists of a passage and a stone chamber. The passages lie in the center of the south walls or close to the east and the floor of a chamber is covered with clay, charcoal and lime. The walls are piled up with trimmed stones and their surface is coated with lime to a thickness of 1-2 centimeters. On the floor of each chamber is a bier standing in east-west or south-north direction.

The newly discovered tombs and relics are of weighty significance in studying the history and culture of the Koguryo Kingdom that existed for one thousand years.