Reed Marsh Introduction: The 25-kilometer-long "Qushui" is the best place to view reeds in the Nansha Wetland. Cruise along the winding river and slowly sail into the depths of the wetland park. The large areas are yellow or green. The reed swamps come towards you, seeming to isolate people from the outside world for an instant, making people unable to extricate themselves and completely immersed in the embrace of nature.