The time of this book is forty years, from 1972 to 2012, in mainland China. The author strives to use actual historical events to construct the living conditions of three generations, including the inheritance of civilization and various changes in values. These are decades of struggle. Several generations have dedicated their youth, blood, and tears to building a great country with a booming economy. Of course, there will also be various social problems in the process. Ordinary people must face multiple hardships and unfairness to grow and succeed. The protagonist of the article, Lu Zijiao, is a hub of the entire story, connecting the main characters and social background conflicts of several generations. Through his growth, we can see through the similar experiences of a large group of people in China. I hope this book can become a window for readers to understand modern life in mainland China.###Huang Zheng, who has a bachelor’s degree, was born in a small rural area in China in the 1980s. He experienced the entire process, from China's economic backwardness to its rapid development. He regards himself as tiny, but he has always insisted that countless insignificant individuals drive the wheel of world history. There is always darkness in the world, and he hopes to do his best to bring a little light to people in darkness.