Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Wu Yun, better known by his style name Zixu , is the most famous ancestor of people with the surname of Wu. All branches of the Wu clans claim him as their "first ancestor". He lived in the Spring and Autumn era (722 BC - 481 BC) of Chinese history. The historical records of Wu are found in two famous Chinese classics: Historical Records by Sima Qian and The Art of War by Sun Tzu. Wu Zixu was a famous Chinese scholar and military general who fought for the state of Wu during the during the Spring and Autumn Period in China. Since his death, Wu Zixu has evolved into a model of loyalty in the culture of China.