All actions must follow commands, only by marching in step victory can be achieved

一切行动听指挥 步调一致才能得胜利
Yiqie xingdong ting zhihui budiao yizhi cai neng de shengli
All actions must follow commands, only by marching in step victory can be achieved
1974, February
Zhejiang renmin chubanshe (浙江人民出版社)
53x77 cm.
BG E16/95

The text in the image and on the musical notation are about the The Three Rules of Discipline and the Eight Points for Attention (三大纪律八项注意).