Lu Xing worked overtime until three in the morning. When he woke up, he was lying on the road fleeing from the drought in Henan in the late Ming Dynasty. There are hungry people around me, and in the distance there are the fires of rogue bandits. She thought she was going to die, but found that her mother had also passed away, thirty-nine years before her. Physics teacher Shen Ruoyu burned glass, smelted steel, and ran a school during the Wanli period, leaving behind "New Edition of Gewu" and a series of mathematical codes. Thirty-nine years later, my daughter understood pi, Fibonacci and her mother's message on the ruins of Guide Mansion. Mom is using constants to talk to her across time and space.
