Cut with a knife and peel with your hands. Gaogua, also known as Zizania latifolia, has two peeling methods.

Cutting with a knife: you can peel the water bamboo with a knife, put it on the chopping board smoothly, then scrape the front and back of the water bamboo with a knife, then peel off the epidermis slowly, and then cut off the old roots at the bottom with a knife.

Hand peeling: Zizania latifolia can be peeled directly by hand, and the epidermis of Zizania latifolia is not hard, so it is easy to remove. Holding Zizania latifolia in your hand, and then peeling the epidermis layer by layer along the cracks in the epidermis of Zizania latifolia will not hurt your hands, but also make Zizania latifolia more complete.