 Houao (Hauao) () is on the windward side against the North Wind.The hills are all covered with grass, maintaining ecological primitiveness.Representative native plant species can be found on this immense hillside, such as "Lycoris radiata Herb" (紅花石蒜), "Lycoris sprengeri" (), "Guizotia abyssinica" (), and "Pittosporum" (), and so on.