123Movies. Huang Hsin-yao began studying documentary filmmaking in order to make a difference as an ecological activist. While attending Tainan University of the Arts, Huang made this film as a continuation of a previous documentary about the salt evaporation ponds near Tainan. But instead of filming the ponds once more, Huang turned his camera around to capture the state of the mangrove habitat surrounding the ponds. The result marks an important evolution for Huang as an ecologically-minded documentarian.