There is a specific melody in everyone's life. For Liu Zhenglin, a national labor model who has been running on the freight line all the year round and the electric locomotive driver of the No. 4 Company of China Railway 20th Bureau, the greetings at dawn and the whispers between the stars are all A silent solo on his haul road.

In his nearly 30-year working career, more than 3,000 on-duty missions and 1.2 million kilometers of safe driving, it is precisely his meticulous sense of responsibility and a sure-fire sense of mission.Editor/Ma Xue