During the Republic of China, the country was in danger, and the four eminent monks of the Republic of China (Master Yin Guang, Xu Yun, Tai Xu, and Hong Yi) appeared, as well as Master Yuanying, Master Dixian, and Master Tanxu. They saved all living beings, promoted Buddhism, and eminent monks communicated with each other. To encourage each other, exchange opinions, and work together to save all sentient beings, this book is based on history and context, with rich characters and real deeds. The legal principles in the book are in line with the classics of various Buddhist schools, and it deeply presents the innovation and persistence of Buddhism in the Republic of China.