"Laundry Song" is a song composed by Li Junxiong in 1964. It was written by Li Junxiong, arranged by Li Junxiong, and sung by Li Guyi. It reflects the theme of the military and civilians being one family and the fish-and-water relationship between the military and civilians. The song is cheerful and lively. It uses Yunnan folk songs as the material and uses ethnic and folk tones as the basic material. Through ingenious artistic conception, it absorbs and retains some of the specialties of Yunnan folk songs, and also creates and develops them.

Simplified musical notation refers to a simple notation method. There are two types of alphabetical notation and number notation. It originated in France in the 18th century, and was later improved by the Germans and became what it is today. Generally speaking, simplified musical notation refers to digital musical notation. The digital musical notation is based on the movable solfa method, using 1, 2, 3, 4, 5, 6, and 7 to represent the 7 basic sound levels in the scale, which are pronounced as do, re, mi, fa, sol, la, si , rest is represented by 0. The duration name of each number is equivalent to the 4 beats of the staff.

There may be some differences due to different versions and sources. If you need more specific musical notation information, it is recommended to look for professional music books or consult professionals.