Cai Xin, also known as cabbage moss, is a plant of the genus Brassica in the Brassicaceae family. It originated in southern China. It is derived from cabbage easy-bolting materials after long-term selection, cultivation and domestication. Its leaves are wide and oval. Or oval, green or light green, and the corolla of the cabbage is yellow, and its seeds are yellow-brown when mature. It is a specialty of Guangdong and Guangxi in my country.

Caixin is a long-day plant, but most varieties do not have strict photoperiod requirements, but sufficient sunlight will be beneficial to growth and development. Grows well on fertile, loose loam soil. Flower bud differentiation and sprout growth speed are mainly affected by temperature.

Caixin likes a mild climate and has wide adaptability. It has no strict photoperiod requirements and can be cultivated year-round. It is suitable for cultivation in sandy loam or loam soils with rich organic matter and convenient drainage and irrigation. If the temperature is too high or too low, the sprouts will be slender, with low yield and poor quality.

The types of cabbage sum include Sijiu cabbage sum, Xiaogang cabbage sum, Yi Daoqi cabbage sum, green willow leaf cabbage sum, large flower head cabbage sum, March green cabbage sum, and Liuye evening cabbage sum. Such as Guangzhou's Sijiu Cai Xin, Huangliu Ye Zao Xin, etc. The growth period is 50-70 days. The plant is upright and starts bolting when it has 4-5 leaves. It is suitable to sow in Fuzhou area from May to September. This type of cabbage is easily affected by low temperature and bolts and blooms. The average temperature must be 22 degrees Celsius. Above °C, normal growth is possible.