A wise and tolerant detective.Jiang Chengyi looks handsome, has a calm personality, and has a good family background. He was a god-like figure in high school.After breaking up with Lu Yan, she chose to leave and study criminal investigation elsewhere.After graduation, he stayed to work in other places. Because of his hard work and strong ability, he was quickly promoted to the captain of the criminal police.Not long after he was transferred back to his hometown, he took over the death case of Lu Yan's colleague, thus reunited with Lu Yan.