Hukou waterfall is located at the borderline of Shanxi province and Shaanxi province, China. Wide Yellow River suddenly changes very narrow when if passes here. 'Hukou' means pot's mouth. So the waterfall is called 'Hukou Waterfall'. There has a proverb that thousands miles Yellow River fills in one pot at this place. The water great momentum at this place. The river and waterfall is also a symbolize of China.