Yellow River draws boundary line in color

When the Yellow River, China's second-longest river, merges into Bohai Sea in Dongying, East China's Shandong province, it creates a distinct boundary between different colors at the junction, with deep blue on one side and yellow on the other.

The Yellow River carries a large amount of mud and sand when it flows all the way down from the Qinghai-Tibet Plateau, making its water appear in mud-like color. Due to the different densities of river and sea water, an obvious line emerges at their confluence when ocean currents are stable in fair weather, especially in June and July.