The man being struggled in the cover photo was a general, below in uniform.
In the first phase of the Cultural Revolution only students from reliable "red families" such as Song Binbin could become Red Guards and only Red Guards could do violence. The Red Guards targets were others--students, workers, and adults--from "black families," who were, or whose families were thought to be, petty capitalists, members of the bourgeoisie, or of less faithful political loyalty.
In the second phase the thinking changed. The true followers of Mao Zedong were those from peasant and worker families. Their targets became the elites and those from the elite red families who had been the original Red Guards. Thus, even an army general like this man could, in the space of a few years go from being photographed with Mao to being photographed as the object of a struggle session.