Rising from the northwestern waters of Pingtan, Shipaiyang—also known as the Half-Ocean Rock Sails—is a world-class example of granite sea erosion. Two towering pillars, one about 33 meters high and the other 17 meters, stand side by side like the sails of a ship cutting through the waves. Ming Dynasty scholars once hailed it as a "marvel under heaven." Shaped by wind and waves over millions of years, this striking seascape blends raw power with a sense of natural grace. As Pingtan's most iconic landmark, it stands as a geological masterpiece etched along the shores of the East China Sea.