What is the name of the estuary surrounded by the delta containing Changzhou Island?
Changzhou Island: Changzhou Island, formerly known in English as Dane or Dane's Island , is an island in the Pearl River Delta of China's Guangdong Province. Pearl River Delta: The Pearl River Delta Metropolitan Region (PRD), also known as Zhujiang Delta or Zhusanjiao, is the low-lying area surrounding the Pearl River estuary, where the Pearl River flows into the South China Sea.
the Pearl River estuary