ELI5: Explain Like I'm 5

Zhang Zhongjing

Zhang Zhongjing was a very smart man who lived a long, long time ago in ancient China. He was a doctor who helped lots of people when they were sick.

He wrote a really important book called the "Shanghan Lun" which tells all about how to treat different kinds of illnesses. It was like a giant book of secrets for how doctors can help people feel better.

Zhang Zhongjing was also helpful because he used things that grew in nature like plants, herbs and roots to make medicine. He wanted to help people feel better without using anything that wasn't natural.

People today still remember Zhang Zhongjing as a really important doctor who helped a lot of people.