This is a series of wetland images captured on traditional film in the Ruoergai Plateau. The Y-shaped walkway in the first frame forces the viewer to choose: two paths, two emulsions, two worldviews. The first five were shot on black-and-white film, and the remaining four on LomoChrome Purple. The Y-shaped fork, two films, two directions. One leads to geographical truth, the other to psychological truth. They question each other, and complete each other. Ultimately, they arrive at a deeper inquiry — is film a vessel for light, or a transformer of light?