According to some old Chinese stories, there once was an ancient emperor named Shennong. At that time, there was no medicine to treat illnesses. Many s people could only wait for （die）.
To save his people, Shennong decided to find and test out different plants. He and his men set out on a journey in s of medicinal（药用的） plants.
Each time the t found a new plant, Shennong would taste it himself. Some plants made him feel sleepy, some c him to have a stomachache, and some made him tremble（颤抖） all over. After Shennong searched and tested over a long time, he and his men discovered lots of medicinal plants.
As they continued their search, the team found a plant small yellow flowers. Shennong picked off one piece from the plant in o to taste it. He said, "It （look） like a medicinal plant. I have to test it, or some people may misuse it."
Suddenly, Shennong's face turned pale and he f on the ground heavily. Even after he was given the leaves from other medicinal plants, he still l his life. People covered him with thousands of flowers. From then on, they called him "the Emperor of Medicine".
