Hello, I'm a fan of online literature. According to my knowledge of online literature, you might be referring to the novel 'The Train Container'. The train conductor was mainly about the protagonist, Ye Fei, who met a mysterious old man on a train. The old man told him that there was a mysterious power that could allow him to travel through different time and space. Ye Fei decided to find this power and had entanglements with various characters on the journey. I hope you like this book.