The Temple of Heaven is about ten miles long, between Zhengyangmen and Yongdingmen. It was built in the 18th year of Yongle in Ming Dynasty (A.D. 1420). There is such a motherwort in the Temple of Heaven. Before the Republic of China, several pharmacies in the Temple of Heaven sold "Mu Yi Ointment". After the Republic of China, they moved out of the Temple of Heaven.

Temple of Heaven, a group of ancient buildings, is world-famous. Hall of Prayer for the New Year, Imperial Dome, Dome and Echo Wall are all familiar names, and many commodities are branded with pictures of Hall of Prayer for the New Year. There is no mention of the architecture of the Temple of Heaven here, but there is a peculiar grass in the Temple of Heaven: tender buds can be eaten as vegetables, called "Gracilaria lemaneiformis"; When you grow up and mature, you can use stems and leaves to boil medicine, which is a good medicine for treating gynecological diseases, called "motherwort", and the medicine boiled out is called "Mu Yi ointment"; Seeds are also gynecological drugs, called "Jianweizi". Why are there so many motherwort in the Temple of Heaven? There is such a story in folklore.

The storyteller said: Before there was no Temple of Heaven in the early years, before the city was enclosed, it was also a large piece of yellow land, where many farmers lived. They are also plowing and digging for food. There lived a Zhuang family named Zhang. The old man has been dead for more than two years, leaving only an old woman. The old woman has no son, only a daughter of 16 years old. The mother and daughter live a miserable life of lack of people and money. Because the old lady misses her husband and is worried that no one will farm for them. The days are getting longer and longer, and she is sick, and her illness is getting worse every day. The old lady is anxious, and Miss Zhang is even more anxious. Many doctors were invited and many medicines were taken, all of which had no effect. Just when the crops were harvested in autumn, Miss Zhang made up her mind to go to Beishan to find a panacea. When she was a child, her parents told her stories that there were many elixirs in the old ravine of Beishan. As long as she is not afraid of climbing mountains, if she finds this elixir, she can cure any serious disease. Miss Zhang has long kept it in mind. At this time, she wanted to go to Beishan to find medicine, so she told her mother, who was not at ease and said, "How can a little girl walk so far?" Teacher Zhang said, "Don't worry, Mom, I will be careful along the way." She entrusted her aunt next door to take care of her mother. With dry food, she went out to Beishan to find a panacea.

When she left home, Miss Zhang was very worried: Where is Beishan? She thought: Beishan must be in the north. Go north! I walked all day and saw the mountains. After three days' walk, I haven't reached Beishan yet. However, the mountain that Miss Zhang saw is getting closer and closer. On this day, I came to a mountain pass. Miss Zhang is thinking: Are you going to enter this mountain pass? Just look at the old man with white beard who came down from the mountain pass. When the old man saw Miss Zhang, he said happily, "Girl, what are you doing in the deep mountain valley?" Miss Zhang told the story of how her mother got sick and went to Beishan to find a panacea. Then she asked the old man with white beard, "Grandpa, is there a panacea in this room?" "yes,