Gongcai is also called moss stem and ring cabbage. It is an annual lettuce plant. It is picky about the growth environment and soil quality requirements. It is understood that the main producing area of ??moss stem in Pizhou, northern Jiangsu is There is a common saying: A field of dried moss seedlings can produce different vegetables ten miles apart. This means that if the same dried moss seedlings grown on the same field of land are planted ten miles apart, they will produce different results. It is dried moss, and what grows ten miles away is lettuce. It is understood that even in the main producing areas of dried moss, the quality of dried moss grown in different fields is slightly different.