Is the sea in Nantong clean?

The sea in Qidong of Nantong is very clean. According to relevant information, Nantong Qidong is located at the southeast end of Jiangsu Province, on the north side of the Yangtze River estuary, surrounded by water on three sides and shaped like a peninsula. It is an important gateway to the sea and the earliest sunrise place in Jiangsu. Qidong is a holiday resort with clear sea, blue sea and blue sky.