How long is the river that flows into the extensional sedimentary basin located in the northern part of the South China Sea?
Pearl River Mouth basin: The Pearl River Mouth basin (PRMB) is an extensional sedimentary basin located in the northern part of the South China Sea. Pearl River (China):  Measured from the farthest reaches of the Xi River, the Pearl River system is China's third-longest river, 2400 km , after the Yangtze River and the Yellow River, and second largest by volume, after the Yangtze.
2400 km