"Running music between classes". The one, two, three, four running song between classes is called "Running Music between Classes", and some of the lyrics are one! two! three! Four! one! two! three! Four! one! two! three! Four! The release date is January 1, 2015.

"Running Music between Classes" has a strong sense of rhythm, adjusts the pace of running, relieves the boredom and loneliness of running, and eliminates the boring feeling during running.