Is that a temporary curtain of some kind because of the journalists there?
I will answer you assuming that you was not joking.
I don't think the curtain is related to journalists. The PLA has its own media personnel’s, newspaper and magazine. I am sure PLA will probably ONLY allow their own journalist access to sensitive areas and the photos or articles will be thoroughly censored. These journalists used to hold military ranks, probably not today, but they are still under the command of PLA. The disciplines applied on them are equally strict as their colleagues baring ranks.