The mysterious origins of ancient bronzeware found in a part of northern China may have been uncovered, with the discovery of the ruins of a complete Bronze Age town in the area.Archaeologists have now recovered hundreds of astonishing artifacts — including bronze drinking vessels, painted pottery, ornaments inlaid with turquoise and carved pieces of jade — at the vast Zhaigou archaeological site, about 70 miles (110 kilometers) south of the modern city of Yulin in Shaanxi province.The relics, dating from more than 3,000 years ago, were made during the Shang Dynasty, which ruled northern China from about 1600 B.C. to...