A common wild grass in wasteland was once the life-saving grass of the poor, and now it sells for 20 yuan per jin

In rural areas, plants are never in short supply, especially wild flowers and grasses, which are found everywhere. Today, the editor will introduce to you a common wild grass in wasteland.
This wild grass is very common in rural areas. It once had another identity as the life-saving grass of the poor. Its name is Asiatic dayflower.
Every spring, Asiatic dayflower grows in large patches. This wild grass can be eaten as a vegetable and can be used to feed cattle. But the more important effect of Asiatic dayflower is its extremely high medicinal value.
Asiatic dayflower contains extremely high calcium and vitamins. It can be used to treat sore throat, difficult urination, blood in urine and other diseases. Now it can sell for 20 yuan per jin in the city!