It began in late October 1967 .
It came under the control of the People 's Liberation Army which at this point had been put in charge of the 13th Bureau by the Central Cultural Revolution Group and Zhou Enlai .
Beginning in late October 1967 , it came under the control of the People 's Liberation Army which at this point had been put in charge of the 13th Bureau by the Central Cultural Revolution Group and Zhou Enlai .