Old iron mountain head into the sea deep, the yellow sea Bohai sea since this division. To the west, the rapids are like clouds, and the mist in the south is windy. This is a spectacular view of the natural boundary between the Yellow Sea and the Bohai Sea in the Lao Tieshan Mountain. The corner of the Lao Tieshan Mountain is located at the tip of the Liaodong Peninsula, extending the Yellow Sea and the Bohai Sea, forming the natural boundary between the Yellow Sea and the Bohai Sea. The color of the sea is "clear". Some of the water in the eastern Yellow Sea is dark blue, while the water in the west is turbid and slightly yellow. This is due to the natural phenomenon formed by the trenches on the seabed.