Photo taken on June 30, 2013 shows the scenery of the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province. Photo: Xinhua

People gather to watch the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province, June 30, 2013. Photo: Xinhua

People gather to watch the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province, June 30, 2013. Photo: Xinhua

Photo taken on June 30, 2013 shows the scenery of the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province. Photo: Xinhua

Photo taken on June 30, 2013 shows the scenery of the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province. Photo: Xinhua

People pose for photos in front of the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province, June 30, 2013. Photo: Xinhua

Photo taken on June 30, 2013 shows the scenery of the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province. Photo: Xinhua

People gather to watch the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province, June 30, 2013. Photo: Xinhua

People gather to watch the Hukou Waterfall of the Yellow River in Jixian County, north China's Shanxi Province, June 30, 2013. Photo: Xinhua