Why do planes keep flying over Suzhou East Bridge?

Planes have been flying over Suzhou East Bridge because the Sunan Airport jointly built by Shanghai Hongqiao Airport and Wuxi Suzhou is not far from Suzhou, so planes have been flying over. According to relevant public information, dongqiao town covers an area of 34.4 square kilometers, with 26,287 permanent residents and 20,000 migrants. Cultivated land area is 1, 3 1.90 mu, which governs 6 agricultural administrative villages and 3 neighborhood committees.