Sun Zheng, a famous professor at H University, passed away at the age of 55. She was never married. When her protégé, Gu Ling, was sorting out her belongings, she saw a notebook in which he wrote, "I was not born before you were born, but when I met you, I was already old" and "Ning Ling" written all over the paper in messy handwriting. Gu Fu burst into tears. In the same year, Professor Gu, a promising professor at H University, resigned and his whereabouts became a mystery. Ten years later, an elegant and lonely woman in a small town in the south passed away. In her suicide note, she wrote, "... You were born before I was born, and I was already old after you were born. You hated me for being born late, and I hate you for being born early.... If there is an afterlife, Azheng, I hope to call you Azheng, and I hope to grow up with you..."
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