Introduction to Sacrifice: On the night of December 4, 1966, Yang Shuicai, who had been busy for a day, wore a torn cotton-padded jacket and sat at the table. On the table were "Chairman Mao's Quotations" and several pieces of manuscript paper, which read "Study and Apply Chairman Mao's Quotations" Works", further plans to build Shuidaoyang. On December 5, people found Yang Shuicai passing away sitting at his desk. He had no wife, children, or savings. What he left behind after his death was only the "communist spirit of not being afraid of hardship and not being afraid of death" praised by Mao Zedong. He went from an ordinary farmer to a hero revered by hundreds of millions of people.