The young man wears a Red Guards armband and reads from the "Little Red Book", a collection of brief quotations from Mao's writings and speeches. It is small and bound in a red plastic cover so you can always carry it with you. A good Red Guard knows the book by heart and rarely reads anything else.
In the top right corner a Mao Quotation originally from March 1957 (also in the Little Red Book): All erroneous ideas, all poisonous weeds, all ghosts and monsters, must be subjected to criticism; in no circumstance should they be allowed to spread unchecked (凡是错误的思想,凡是 毒草,凡是牛鬼蛇神,都应 该进行批判,决不能让它们 自由泛滥).