Underground Trek: Chasing the Murderer Through the Air at the Beginning

My name is Lin Feng. Three years ago, I traveled back in time to the 1990s. It happened that the No. 320 Bus in Jiangcheng disappeared mysteriously, causing a sensation. My girlfriend Qin Ya's whereabouts are unknown. Some citizens who witnessed it even said that the bus disappeared out of thin air. Then, I activated the all-around crime-solving system!