Sun Tzu is a legendary Chinese general who lived during the sixth century B.C. He was a general in the Han dynasty, and a member of the royal court of the Kingdom of Wu. His book, The Art of War, is a military treatise that describes military strategies and tactics, and offers a strategic guide to defeating an enemy. The book is considered one of the most influential military works in history.

The book is divided into 13 chapters. The first chapter is called "The Sun," and it describes the sun, how it rises and sets, and what it reveals.