A cascade of water plunges over the rocks in a winter scene at the Ailao Mountain and Wuliang Mountain National Nature Reserve in Yunnan province, Dec 2, 2015. Located in the midwestern part of Yunnan province, the Ailao Mountain and Wuliang Mountain National Reserve mainly preserves mountain-mixed forest ecological systems, subtropical evergreen broad-leaved forest ecological systems and rare animal and plant species. Due to the rich mix of waterfalls and diverse wildlife, it is a good place for scientific research, exploration and sightseeing.[Photo/Xinhua]