1, bamboo tube cabbage is called water chestnut in Guangdong, also known as cowhide cabbage, thick-skinned cabbage and light-skinned cabbage, which is a variety of Chenopodiaceae beet. Biennial herbs, seedlings or leaves as vegetables. Originated in southern Europe, it was introduced to China from Arabia in the 5th century.

2. Water chestnut can be divided into three types according to the color of petiole: white stem, green stem and red stem. Green straw is more common among farmers in China. Originated in southern Europe, it was introduced to China from Arabia in the 5th century. According to the color of petiole, pig cabbage can be divided into three types: white stalk, green stalk and red stalk. Green stalk is widely planted among farmers in China.