Jiangyin (simplified Chinese: 江阴; traditional Chinese: 江陰; pinyin: Jiāngyīn; Wade–Giles: Chiangyin, Jiangyin dialect: [kɐ̞ŋ.jɪŋ]) is a county-level city on the southern bank of the Yangtze River, and is administered by Wuxi, Jiangsu province. It has a population of 0.8 million (est. 2008). The total GDP (nominal) reached RMB 171.3 billion yuan (US$25.1 billion) in 2009, an increase of 11.6% from 2008. The GDP per capita (nominal) reached RMB 142,572 yuan (US$20,880). Jiangyin is one of the most important transport hubs on the Yangtze River, and it is one of the most developed counties in China. Since 2003, its overall competitiveness is the first of China’s hundred counties. East of the city is Huaxi Village, the so-called richest village in China.With 1,595,138 inhabitants at the 2010 census, the city is now part of Jiangyin-Zhangjiagang-Jingjiang built-up area with 3,526,260 inhabitants, growing very fast and could nearly be part of Shanghai-Suzhou-Wuxi-Changzhou Megacity built-up area. Wikipedia
A place in China, Jiangyin is an interesting place to visit, given its unique culture, history and character. A gripping city on its own right, Shanghai also deserves a visit. Attractions in Shanghai include Nanjing Road, The Bund, Xintiandi. Also, to reach Jiangyin, you'll have to take a flight to Shanghai; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. A holiday in Jiangyin can generally be of 1-2 days.
Yes,it is that simple really! Enjoy your trip! Keep travelling!