This is a book about a man, a father and an enterprise. It tells the story of the suffering experience in the the growth stage of Ren Zhengfei, the boss of Huawei, as well as the influence of the parents on him; analyzes the twists and turns from his resignation from a state-owned enterprise to starting his own business step by step, as well as the bitterness, hardship, tribulation, despair and persistence he has experienced; based on his life experience, summarizes Ren Zhengfei's theory of "Gray Philosophy" and underlying management thinking system in Huawei. From the parallel clues of Ren Zhengfei and Huawei, the author presents the ideological history of Huawei over the past 30 years to the readers, and let readers understand the reasons why Huawei employees have unified thoughts, strong cohesion and Why Huawei step by step goes global.