有一本书，过了2500年，仍然被人们提及。在战争里，在商业中，这本书都被视作经典。这本书就是《孙子兵法》。今天我们来看看，孙子是谁？《孙子兵法》讲了什么？《孙子兵法》是怎么被外国人知道的？
There is a book, which after 2500 years is still mentioned by people. In wars, in business, this book is seen as a classic. This book is “the Art of War” by Sun Tsu. Today we will look at these questions: Who is Sun Tsu? What does the book talk about? How is the book introduced across the world?