Qingdao (China) is 8.4 times larger than Qidong, Jiangsu (China).
Area: 1,311 km2 calculated
Qidong is a county-level city under the administration of Nantong, Jiangsu province, China. It is located on the north side of the Yangtze River opposite Shanghai and contains the province's easternmost point. It has a population of 1.12 million. The center of the city is named Huilong Township. Wikipedia
Area: 10,965 km2 calculated
Qingdao is a major city in eastern Shandong Province, Eastern China. Administered at the sub-provincial level, Qingdao has jurisdiction over 7 districts and 5 county-level cities. Wikipedia