Claim: Tongshan District, one of the six districts of Xuzhou in Jiangsu, China which was originally called Pengcheng County, has a population of more than 1.3 million  and is elevated by 35 meters.
Evidence: 'bronze mountain'), formerly Tongshan County (铜山县; 銅山縣; Tóngshān Xiàn) is one of six districts of Xuzhou, Jiangsu province, People's Republic of China, bordering Anhui and Shandong provinces. 35 m (115 ft) 1,331,500 Tongshan was originally knows as Pengcheng County, the latter merged into Xuzhou during the Yuan and the Ming dynasties, also in the early Qing.