Between winter and spring, the shadows of rocks and woods are reflected in the green pool accompanied by white, swift currents. Cascades plunge and flow across cypresses increasing at extremely high peaks. Clean water, flourishing trees, lofty mountains and luxuriant grasses compose the landscape. When the sun starts to rise or frost falls in the morning, forests and streams are chilly and solemn, and one can often hear monkeys howling from peaks. Their cries sound sad and strange and last in the valleys for quite a while, because of that, local fishers think the Wu Gorge is the longest of the Three Gorges in the east of Sichuan province.