Although there is not much difference in appearance between choy sum and kale, they are still very different. First of all, they are not the same family of vegetables, kale is a kind of collard greens, while the heart of cabbage is a kind of cabbage; second, their taste is different, the heart of cabbage has a very tender taste, the taste of kale is slightly bitter; finally, their practices are different, the kale is usually fried, while the heart of cabbage is suitable for boiled and cold.

Cabbage heart is also known as vegetable shoots, cruciferous Brassica genus, one, two-year-old herbaceous plants. Suitable for sowing in the warm areas of the south, is one of China's southern specialty vegetables. Can be sown throughout the year, now all over the world have introduced cultivation.

Kale moss is one of China's famous specialty vegetables, originated in the south of China, the main producing areas are Guangdong, Guangxi, Fujian and Taiwan and other provinces and regions, coastal and northern suburbs of large cities have a small amount of cultivation.