From the First Train to the Last Train

A three-year-old girl got separated from her parents and was picked up by a childless couple at a bus terminal and raised along the way. There is no slap in the face, no white lotus and Phoenix man, just an ordinary life. When the girl grew up, she designed a 24-hour bus express line from the bus terminal to her hometown. Complete the spiritual redemption of two generations and two families from the first train to the last train.