A Kid from an ABO World Travels to a Parallel World to Save His Mom [Crime Investigation]

Inspired by Frequency. The title is just a placeholder for now, and I haven't decided whose perspective to use. It's been so long since I last came back that I'm completely out of the loop. 1. All laws and regulations serve the plot. 2. Set in 1997 in a fictional port city in northeast China. 3. A story about everyday life, solving crimes, and falling in love. The police investigation details aren't professionally researched. In December 1997, Zheng Weidong, chief of criminal investigations in a northern port city in an ABO world, and Gu Yanbin, director of a chemistry and physics lab at a police academy in the south, meet, fall in love over a case, and have a child named Zheng Chun. Before Zheng Chun's seventh birthday, his mother, Gu Yanbin, dies in the line of duty. After growing up and presenting as a dominant Enigma, Zheng Chun clashes with his father, Zheng Weidong, over his college entrance exam choices. He then transmigrates to a parallel world without ABO and turns into a six-year-old little rascal. His arrival sets off a butterfly effect. In the parallel world, which has no ABO, Zheng Weidong has never met Gu Yanbin, yet before ever meeting him, he somehow knows that he'll have an expert wife from the south. Now a six-year-old rascal who hasn't even realized this is a world without pheromones, Zheng Chun spouts off: “My mom's from the south. So what if he's a little fussy? Dad, can't you be a bit more understanding? What's wrong with being afraid of your wife? Old Zheng, shut your mouth and feel! Can you feel your heart racing? He's really your wife!” Zheng Weidong: “How could my wife be a man?” Fake northeastern dialect, fake Cantonese, a rugged northeastern man × a southern expert, a kid who's a mashup of north and south, and one happy family. The first case is slowly underway. Theme: Live well and love well