Where is the largest high-speed service area around Shanghai?

Located in Suzhou City, Jiangsu Province, China. Yangcheng Lake Service Area, located in Suzhou City, Jiangsu Province, China, is an expressway service post under the jurisdiction of Jiangsu Ninghu Expressway Co., Ltd., an important node of the overlapping section of Beijing-Shanghai Expressway and Shanghai-Chengdu Expressway, and one of the largest service areas in China. According to Baidu map, the largest high-speed service area around Shanghai is located in Suzhou City, Jiangsu Province, China. Shanghai, referred to as "Shanghai" or "Shen" for short, is a provincial administrative region, a municipality directly under the Central Government, a national central city, a megacity and the core city of Shanghai metropolitan area in People's Republic of China (PRC).