"The arrival of PLA troops in the vicinity of Beijing is definitely not aimed at dealing with students. They have not come here to deal with the students. Their aim is to restore the normal order of production, of life, of work in Beijing Municipality. At the same time, they aim to protect a number of important departments and major government organs. Therefore, the stationing of the PLA troops in the capital is aimed at maintaining public security. They are, by no means, directed at the students. Everyone will be able to clearly see their activities in the next few days [applause]."
January 1, 1970
https://en.wikiquote.org/wiki/Yang_Shangkun