In early spring, as temperatures warm up and upstream ice melts, the amount of water at the Hukou Waterfall of the Yellow River, located at the border of Jixian County in Shanxi Province and Yichuan County in Shaanxi Province, increases. The rolling Yellow River water rushes down, splashing waves and mist under the sunlight, forming a beautiful rainbow flying over the Hukou Waterfall of the Yellow River, complementing the rushing and roaring Yellow River water, which is breathtaking.