What is Su Dongpo's poem about shepherd's purse?

"Ci Yunzi grew vegetables that would not grow after a long drought."

Full poem: Bamboo shoots sprout under the steps in the New Year, and frost rake down the old poppies in the kitchen. At that time, he went around the wheat fields looking for wild shepherds, and forced him to cook mountain soup for the monks. There is no need to sigh when there is no rain in the garden. The body is incompatible with the times and has to be abandoned for farming. If you want to see how old you are, there are two or three stems of autumn colors on your temples.

Interpretation: Spring has just arrived, but the bamboo shoots have already grown under the steps; the pickle jar in the kitchen has fallen to the ground, and there are no pickles left at all. He often walked around the wheat fields, trying to find some shepherd's purse; he reluctantly imitated the monks in the monk's dormitory and cooked some wild vegetable soup in the mountains.

There is nothing to sigh about when there is no rain and dew in the vegetable garden; the times are contrary to one's own wishes, so naturally one should retreat to the countryside. Of course there are places where you want to see the traces of time; the hair on the temples has turned gray.

Su Shi's Dongpo Soup:

It is said that when Su Dongpo was the governor of Yangzhou, every spring when he had nothing to do, he often went to Pingshan built on the middle peak of Shugang in the northwest suburb of Yangzhou. Tang and Gulintang, one way to pay homage to their mentor Ouyang Xiu, and the other thing is to dig the delicious shepherd's purse that is sprouting green all over the mountains and plains.

He slow-cooked fresh shepherd's purse, white radish and japonica rice into a soup, and added a little seasoning to create a fragrant and rich porridge. Later, the cooking method of this porridge was passed down and was called "Dongpo Geng" by Yangzhou people. Some literati gave it the reputation of "Pearl Green Flower", describing the rice grains as white as pearls and the shepherd's purse as green as emerald.