Introduction："Always on the Move” is an emotional period drama directed by Zheng Xiaolong ("Empresses in the Palace") and Liu Zhangmu ("The Thunder"), and starring Bai Jingting ("New Life Begins"), Jin Chen ("No More Bets"), and Ding Yongdai ("Creation of The Gods I: Kingdom of Storms"). In the late 1970s, on the steam train from Ningyang to Harbin, a young police officer Wang Xin (played by Bai Jingting) is on duty and shuttling among crowds of passengers. He mistakes an old railway policeman Ma Kui (played by Ding Yongdai) as a fugitive, and their conflict gradually develops into a mentor-and-apprentice friendship. From disliking each other to sympathizing with each other, Wang Xin and Ma Kui fight side by side on the front line of railway public security. They crack down on theft, kidnappings, drug trafficking, and fraud, always prioritizing the safety of the passengers and selflessly safeguarding the trains traveling from the south to the north. From steam locomotives to electric locomotives to high-speed trains, the new and old-generation railway police officers Wang Xin and Ma Kui witness the development of China's railway system and China's rapid changes as they uphold the spirit of the police. This drama will be streaming on iQIYI International (iQ.com).