Sun Toutou is played by Zhao Lusi. In her twenties, she had no father or mother and got into trouble in an accident. Ren Xinzheng happened to help her and discovered Sun Toutou's life experience, so he asked her to join his team.Inherit the class and help Sun TouTou restart his life. It can be said that without the appearance of Ren Xinzheng, Sun TouTou's life may not be so exciting.

In the class, Tou Tou Sun has an enemy, Ren Xinzheng’s son Ren Tianzhen. They despise each other and have caused a lot of troubles. They are a pair of enemies. What people didn’t expect is that as time goes by,Through the baptism of love, the relationship between the two became better and better, and they also developed different feelings for each other. In the end, they came together and lived a happy and beautiful life, and the ending was quite satisfactory.

Tou Tou Sun, played by Zhao Lusi, gave people the impression of lying and arrogant from the moment he appeared on the scene. He was obviously late for delivering the food, but he lied to customers that he had already arrived.Later, she was redeemed from the police station by Ren Xinzheng, a professor of traditional Chinese medicine whom she had never met.

At the same time, Ren Xinzheng also invited Sun Toutou to join the team of traditional Chinese medicine doctors and promised to take care of food and housing for a month and give him another 4,800.With such a thing happening in the world, Tou Tou Sun is naturally very cautious and demands money as soon as he appears.

Eventually, Toutou Sun learned that he was the inheritor of Jiang's acupuncture method, and began to gain a new understanding of traditional Chinese medicine under the guidance of Ren Xinzheng.At the same time, Sun Toutou also gained a beautiful love in the process of learning Chinese medicine, and ended happily with Ren Tianzhen.

In the end, Toutou Sun found his own destination. He was pampered by the Ren family and prospered in his career. He successfully counterattacked from an unknown delivery girl to become a famous teacher of traditional Chinese medicine.