Ban Gu was a person who lived a long time ago in ancient China. He was very smart and wrote a really, really important book called the “Records of the Grand Historian”. This book tells about the history of China, and also about other countries and cultures. It has stories about things like wars, famous people, and inventions. Ban Gu was a historian, which means he studied and wrote about things that happened long ago. We can learn a lot about China and the world because of the book he wrote.