Polygala tenuifolia, a commonly used Chinese medicine, was first recorded in Shennong's Classic of Materia Medica and was listed as the top grade in Benjing. It and many traditional Chinese medicines are also used by literati to write poems, articles and letters, forming interesting literature.

For example, Gong Zizhen, a thinker and writer in the late Qing Dynasty, once wrote a poem on the theme of "Yuan Zhi": "Nine sides are connected with carving insects, and Yuan Zhizhen looks at grass." It is said that athletes are wasted in their hands, and blue light and snow block Shandong. "

The main idea of the poem is: although I am familiar with the art of war and have specific methods against the enemy, I can't be reused by the court; Although he has the ambition to protect his country and defend his country, he is as far-reaching as Chinese medicine, with an empty name and looks like ordinary grass; Although there are athletes, heroic ambitions and extraordinary skills, they can't move forward like wanderers stuck in Shandong road by heavy snow. Just like the historical background of this poem-when Lin Zexu went to Guangdong to ban opium, he predicted that British imperialism might send troops to invade, so he suggested that the Qing court strengthen its combat readiness and consolidate its border defense, but his suggestion was not taken seriously and adopted. The poet vividly expressed his life ambition here, and expressed his state of mind that he would not be reused through the vision of traditional Chinese medicine.