Yu Siheng, whom he hadn't seen for four years, suddenly returned to China. The class reunion was just a cover. He just wanted to meet Song Qinghuan, who had been thinking about it day and night. Time is greedy and will devour everything. Song Qinghuan never believed that time could dilute everything. Many years later, when she heard the words "Yu Siheng" again, her eyes still filled with tears and she lost her sense of place.