A Landscape Painted by Salt
The Red Beach, located in the Liaohe River Delta near Panjin, is not a sandy shore but a vast coastal wetland. Its famous crimson color is produced by a dense carpet of a salt-tolerant plant, or halophyte, called Suaeda salsa. This species thrives in the saline-alkaline soil of the marsh, which covers an area of roughly 100 square kilometers. The Liaohe River Delta is one of the world's largest wetlands and reed marshes, creating a unique environment where few other plants can survive the high salt concentrations.
The plant's life cycle dictates the beach's appearance throughout the year. In the spring, around April and May, the Suaeda begins to grow and is a tender, light red or green color. As summer progresses into autumn, the plant matures. The increasing salinity of the soil triggers a dramatic biochemical change. Chlorophyll, the pigment responsible for the green color, breaks down. This reveals the red pigments (anthocyanins) stored within the plant's cells. The process intensifies from August through October, with the landscape reaching its most bright red from mid-September to mid-October. As winter approaches, the color deepens to purple before the plant dies back.