It was made between 3900-3000 BC. Later, a bell - shaped utensil made out of fine gray pottery clay was unearthed from the remains of the Longshan culture (2800 - 2000 BC) at Doumen Town ...

Photos show a few of the treasures found at the ancient site. The oldest ruins included two small tombs from the Longshan culture, a Neolithic culture dating from roughly 2600 to 2000 B.C ...