Also known as local dishes, it is a kind of wild vegetables that people like to eat.

Shepherd's purse is also known as grass protection and water chestnut. Feed on young leaves. Originally from China, it has spread all over the world. China has collected wild shepherd's purse for food since ancient times, which was recorded as early as 300 BC. From the end of 19 to the beginning of the 20th century, Shanghai suburbs have been cultivated for more than 90 years.

At present, major cities in China have begun to introduce and cultivate, but they are still in the range of sporadic production.

In China tradition, the Han people have the custom of eating local dishes and boiling eggs.