Claim: Tongshan District, one of the six districts of Xuzhou in Jiangsu, China which later merged with and adapted the name 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. Tongshan was originally knows as Pengcheng County, the latter merged into Xuzhou during the Yuan and the Ming dynasties, also in the early Qing. 1,331,500 35 m (115 ft)