Bitter greens are relatively bitter, but there are many kinds of bitter greens, among which the purple-flowered Shue Rong bitter greens are the best, is for the annual wild bitter greens belong to the Asteraceae family of plants of the whole grass. It is usually harvested early in the spring and dried naturally.

The nutritional value and efficacy of the bitter vegetable, the bitter vegetable for chronic cholecystitis as well as the resulting chronic gastritis have a very good therapeutic effect and role.

The bitter vegetable features, bitter vegetable leaf back white velvet, bitter vegetable from the picture to observe the general growth in the ditch next to the roadside more, was scattered and concentrated distribution, due to the season and climate or natural disasters and other reasons, the number of picking year by year to reduce the number of bitter vegetable due to the timing of the picking of the different, the efficacy of its production is also different, the bitter vegetable in time to dig in order to be useful.

Bitter vegetables in ancient times called Tuan, that is, we are now known as tea, often eat bitter vegetables good, folk consumption of bitter vegetables has a history of more than two thousand years, but also commonly used to do herbal medicine. In the spring and summer eat the most wild vegetables, bitter vegetables should be ranked first. Because it is common in the roadside, ridge or wasteland, all over the country are distributed, easy to pick, and have heat detoxification, sterilization, anti-inflammatory, summer health care, so in the spring and summer are often picked, made into dishes on the table, taste. China's folk since ancient times have eaten bitter vegetable custom, "Poetry" in the record: "who said that the bitter, its sweet as chestnut". The Ming Dynasty also listed it as a rescue food, then the eating method is: picking seedling leaves fried, soaked in water to remove the bitter taste, washed, oil and salt seasoning.

Shurong bitter vegetable in the countryside called purple flower bitter vegetable, origin of Jiangsu irrigation, it is a kind of bitter vegetable, because of its purple flowers and so named, the back of her leaves have white fluff, usually only in the right season to pick useful. It used to be often used to fill the hunger, purple bitter vegetable especially in the wilderness years, that is used to save lives with, purple bitter vegetable in the use of the time also have to pay attention to, even when filling the hunger is often also the middle of the bitter core to remove, so as not to feel bitter, eat alone bitter vegetable is not recommended to eat more, but used to regulate the stomach and stomach of the time or the role of the maintenance of the time, it is to be added to the method of brown sugar, the use of the use of the method is a little bit of a trick. Brown sugar and is added after cooking, rather than adding during the cooking process.