Oh, whatever does it mean?
Usually these protocols take place prior to situations where the United States would enter the foreign consulate (sovereign Chinese soil) following a declaration of war.
I’m not saying that’s what is happening here, but there aren’t many situations where these protocols are ordered. (youtube)
I’m sure that you saw this on the major network news, right?
It may have been that there was a fire in the consulate and the staff was ordered to burn classified documents because Houston Fire would be entering the facility, but we don’t know for sure.