<p>One day, while Lin Chen read a book, Xing Cong Lian said to him, “You’re a psychologist. Can you help me find out what kind of person is suitable for me to marry?”</p><p>Lin Chen remembered telling him love was the most immeasurable thing in the world. Even psychologists couldn’t predict love, because its progress in two people’s lives had countless variables.</p><p>What variables?</p><p>Lin Chen thought, at the time, the first variable was: You’re just an ordinary police officer who liked ea...