What is grandchild disease?It is a masterpiece of ancient Chinese military history, and is also called the oldest extant military book in China, Grandson 孫子”, “Wu-Sun-Zi’s Warfare Law 吳孫子兵法”, and “Sun Wu Warfare 孫武兵法”.Sun Tzus method of warfare is a book of tactics for survival in Chinas Spring and Autumn Warring States Era, and Sun Tzu put it up as a powerful power in the Middle East 7 years after he became the chief of staff of the Wu dynasty, which was now insignificant in the Shanghai area.The grandson left his thoughts on the strategy to make the organization stronger in 6,200 Chinese characters, and the book that we read today is the book called Grandson Warfare, in which the grandson systematically writes down how the organization becomes strong and survives while leading the soldiers and fighting the enemy. .