What method of change did Mao recommend?

Mao set the scene for Cultural Revolution by "disinfecting" powerful officials of questionable loyalty who were based in Beijing. His approach was less than transparent, achieving this purge through newspaper articles, internal meetings, and  employing the network of political allies.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.