This work mainly describes a university professor who used his own expertise to plan a three-year development plan for the Bai ethnic minority area during the period of "sending science and technology to the countryside, and taking a temporary job for training", turning the barren ethnic minority area into a prosperous tourist attraction. After returning to the university, he continued his career as a professor. When he wanted to write a textbook, he encountered his wife's menopause. He met the Bai girl who loved him deeply and pretended to be a housekeeper, and acted out a love entanglement that broke up the happy family. However, when he and the Bai girl began to fall in love, he received a call for help from his ex-wife who had terminal cancer. He resolutely returned to the arms of his ex-wife and carefully accompanied her throughout her final life, embodying the philosophy of "there is great love in the world".