Aerial photo taken on June 4, 2018 shows the scenery of Changqingsha Island in Changjiang Town of Rugao City, east China's Jiangsu Province. (Xinhua/Xu Congjun)

Aerial photo taken on June 4, 2018 shows the scenery of Changqingsha Island in Changjiang Town of Rugao City, east China's Jiangsu Province. (Xinhua/Xu Congjun)

Aerial photo taken on June 4, 2018 shows the scenery of Changqingsha Island in Changjiang Town of Rugao City, east China's Jiangsu Province. (Xinhua/Xu Congjun)

Aerial photo taken on June 4, 2018 shows the scenery of Changqingsha Island in Changjiang Town of Rugao City, east China's Jiangsu Province. (Xinhua/Xu Congjun)