This book is adapted from my personal real experience in recent years. It depicts the continuous growth process from three aspects before joining the army, when joining the army, and after leaving the army. It can be regarded as a trilogy of self-growth. It is mainly aimed at the post-90s generation who have different personalities and thoughts and are struggling with the contradiction of not being favored by society. They have to prove themselves in the constant battle of being regarded as "not doing their job properly" by others. In the constant suffering, he created an image of how young people with dreams can be happy and unrestrained. It uses actual experience to illustrate the hard-won suffering and glory, and reveals that there is no such thing as a sudden appearance, and any visible and tangible success cannot be obtained casually, and ultimately realize the value of life.