Question: Which city, Suihua or Gaoyou, is a county-level city under the administration of Yangzhou, Jiangsu province, China, located in the Yangtze River Delta?

Context articles: Geography of Shanghai
Changshu
Yangtze River Delta
Gaoyou Lake
Suzhou
Gaoyou
Shaobo Lake
Taixing
Runyang Yangtze River Bridge
Suihua

The geography of Shanghai is characterised by its location on the Yangtze River Delta on China's east coast and its proximity to the Pacific Ocean via the East China Sea.
 The city is centred on the Huangpu River, a tributary of the Yangtze River, and extends outwards in all directions, with the suburbs and satellite towns reaching east to the East China Sea, north and west to Jiangsu province, and south to Zhejiang province over Hangzhou Bay.
Changshu () is a county-level city under the jurisdiction of Suzhou, Jiangsu province, and is part of the Yangtze River Delta.
 It borders the prefecture-level city of Nantong to the northeast across the Yangtze River.
 Due to the mild climate and terrain there, it has enjoyed a high level of agriculture civilization since ancient times, and is named after this, for the first character of its name (常 ) means "always, often", while the second (熟 ) means "ripe".
 The name of the adjacent county-level city of Taicang means "great granary".
The Yangtze River Delta or YRD is a triangle-shaped metropolitan region generally comprising Wu-speaking area, Shanghai, southern Jiangsu province and northern Zhejiang province of China.
 The area lies in the heart of the Jiangnan region (literally, "south of the River"), where Yangtze River drains into the East China Sea.
 The urban build-up in the area has given rise to what may be the largest concentration of adjacent metropolitan areas in the world.
 It covers an area of 99,600 km2 and is home to over 115 million people as of 2013, of which an estimated 83 million is urban.
 If based on the greater Yangtze River Delta zone, it has over 140 million people in this region.
 Having a fertile soil, the Yangtze River Delta abundantly produces grain, cotton, hemp and tea.
Gaoyou Lake（）is the sixth largest freshwater lake in China, it is located between Anhui Province and Jiangsu Province.
 In a sense Gaoyou Lake is a manmade lake, and its creation is part of a long story about flood control and hydraulic engineering in ancient China.
 Gaoyou Lake is now part of the Huai River system as the Huai River flows south through Gaoyou Lake on its way to the Yangtze River and the Pacific.
 It is about 39 km long and 30 km wide, covering approximately 674.7 km.
Suzhou, formerly romanized as Soochow, is a major city located in southeastern Jiangsu Province of East China, about 100 km northwest of Shanghai.
 It is a major economic center and focal point of trade and commerce, and the largest city in the province.
 The city is situated on the lower reaches of the Yangtze River and the shores of Lake Tai and belongs to the Yangtze River Delta region.
 Administratively, Suzhou is a prefecture-level city with a population of 4.33 million in its city proper, and a total resident population (as of 2013 ) of 10.58 million in its administrative area.
 Its urban population grew at an unprecedented rate of 6.5% between 2000 and 2014, which is the highest among cities with more than 5 million people.
Gaoyou (), is a county-level city under the administration of Yangzhou, Jiangsu province, China, located in the Yangtze River Delta on the north side of the Yangtze River.
Shaobo Lake（）is a freshwater lake in Jiangsu Province, China, it is located between Gaoyou and Yangzhou.
 Shaobo Lake is a part of the Huai River system as the Huai River flows south through Shaobo Lake on its way to the Yangtze River like Gaoyou Lake.
 It is about 17 km long and 60 km wide, covering approximately 77 km.
Taixing () is a county-level city under the administration of Taizhou, Jiangsu province, China.
 It is located in the Yangtze River Delta, bordering the prefecture-level cities of Nantong to the east, Changzhou to the southwest, and Zhenjiang to the west.
 It is a newly developed coastal industrial city.
 The area of Taxing is 1253 square kilometres and the population is 1.29 million.
The Runyang Yangtze River Bridge () is a large bridge complex that crosses the Yangtze River in Jiangsu Province, China, downstream of Nanjing.
 The complex consists of two major bridges that link Zhenjiang on the south bank of the river and Yangzhou on the north.
 The bridge is part of the Yangzhou–Liyang Expressway.
 Construction of the bridge complex began in October 2000 and was completed ahead of schedule.
 The bridge cost 5.8 billion Yuan (about US$700 million).
 The complex opened to traffic on April 30, 2005.
 The total length of the bridge complex is about 35.66 km .
 In between the two bridges is the island of Shiyezhou.
Suihua () is a prefecture-level city in west-central Heilongjiang province, People's Republic of China, adjacent to Yichun to the east, Harbin, the provincial capital, to the south, Daqing to the west and Heihe to the north.
 It has 5,418,453 inhabitants at the 2010 census, of whom 877,114 lived in the built-up ("or metro") area made of Beilin District.