Since the 50s of last century, Beijing has been holding the "Red May" singing competition. For decades, the "Flowers of May" mass singing activity has been prosperous.
The singing activities of the tube factory have expanded from several departments and workshops to the whole factory, and before each factory meeting, the singing is loud one after another. There are solo singing, performance singing, as well as singing and singing between groups or classes, duet songs, and sometimes singing and dancing. The song has accompanied generations of Beijingers through the glory days.