South to North

In 1978, on a train from Dalian to Sankeshu, young police officer Wang Xin was injured during an arrest during his first duty. However, as a blessing in disguise, he met Ma Kui, an old railway police detective. The two became masters and apprentices, fighting side by side on the front line of railway police. On this railway line, over the past 40 years, they have experienced the era of steam locomotives, electric locomotives, and high-speed trains, and witnessed the great achievements of the motherland and the tremendous changes in people's lives. Front-line railway police officers represented by Wang Xin and Ma Kui have been engaged in anti-piracy, anti-trafficking, anti-narcotics, patrolling, guarding, cracking down on theft and robbery, and cracking down on gangs and evil. For decades, they have been solving major cases, resolving minor cases, bringing warmth to passengers, and creating harmony. In order to protect the safety of people's lives and property, railway police officers even sacrificed their precious lives. Passengers coming and going on the train bear different marks from different periods, showing the warmth and warmth of human nature and the various aspects of life. The old and new generations of police officers have also been sublimated in their life experiences, and their loyal police spirit has been passed down from generation to generation.