The shape of the pottery bell is similar to that of the Shang Dynasty bronze nao, which provides important clues for exploring the origin of the nao and bell musical instruments. The pottery bell of Yangshao Culture in Miaodigou, Shaanxian County, Henan Province, now in the National Museum, is about 5900 years old. The pottery bell unearthed in the Xi'an Longshan Cultural Site of the Ancie...