The postcode of Nanjing, Jiangsu Province is 2 10000, Nantong, Jiangsu Province is 226000, Suqian, Jiangsu Province is 223800, Changzhou, Jiangsu Province is 2 13000, Xuzhou, Jiangsu Province is 22 1000, Yangzhou, Jiangsu Province is 225000 and Wuxi, Jiangsu Province is 225.

The postcode of Yancheng City, Jiangsu Province is 224000, that of Suzhou City, Jiangsu Province is 2 15000, that of Lianyungang City, Jiangsu Province is 222000, and that of Zhenjiang City, Jiangsu Province is 2 10000-226000.

Jiangsu Province, referred to as "Su" for short, is the provincial administrative region of People's Republic of China (PRC), with Nanjing as its capital, located in the Yangtze River Delta region, bordering on the eastern coast and four provinces of Shanghai, Zhejiang, Anhui and Shandong, with a total area of 107200 square kilometers. Jiangsu Province was founded in the early Qing Dynasty, and was named after jiangning house and Suzhou.

Topography of Jiangsu province

The topography of Jiangsu Province is mainly plain, with a land area of 103229. 17 km2, of which the plain area accounts for 86.89%, reaching 89,706.03km2, and the hilly area is1/916./kloc-0.

Jiangsu Province is the lowest-lying province in China. Most areas are below 50 meters above sea level, and low mountains and hills are concentrated in the southwest, accounting for 14.3% of the total area of Jiangsu Province, mainly including Laoshan Mountain, Yuntai Mountain, Ningzhen Mountain, Maoshan Mountain and Yili Mountain. Yunnu Mountain in Yuntai Mountain, Lianyungang is the highest peak in Jiangsu, with an altitude of 625 meters.

The above contents refer to Baidu Encyclopedia-Jiangsu.