Li Chong was a person who lived a long, long time ago during a time called the Tang Dynasty in China. During his life, he did some things that made him pretty famous and important in Chinese history.
Now, during the Tang Dynasty, there were many emperors - think of them as really powerful kings - but Li Chong was not an emperor himself. Instead, he was a really smart person who worked for the emperor and helped him make important decisions.
One of the things that made Li Chong famous was the way he helped the emperor create a new set of laws. These laws were fair and made sure that everyone in China was treated equally, no matter who they were or where they came from.
Li Chong was also really good at math and was able to solve complex problems using numbers. This helped the emperor make important decisions about things like how much money to spend on projects and how to manage the country's resources.
But Li Chong wasn't just a brainy guy - he was also really brave. One time, when the emperor was in danger, Li Chong risked his own life to save him. He fought off a group of attackers and the emperor was able to escape unharmed.
So you see, Li Chong may not have been an emperor himself, but he was still a really important person during the Tang Dynasty. He helped create fair laws, made important decisions using his math skills, and even saved an emperor's life.