Water shield is the tender stem and leaf of the water celery plant, a perennial aquatic herb, known for its freshness, tenderness, and being one of the precious vegetables.Originally from China, it now grows in Eastern, Southern Asia, Africa, Oceania, and various countries in North America.In China, it primarily originates from the Taihu Lake Basin in Zhejiang and Jiangsu provinces, with harvesting taking place from late April to late October on tender shoots with rolled leaves; West Lake water shield is most renowned.Water shield has long been considered a precious vegetable due to its rich flavor, tenderness, and high content of amino acids, arabinose, mannose, vitamins, etc., greatly beloved by people.
