The new “anti-terrorism manual” is the latest in a string of warnings issued by an increasingly jittery Chinese government in the run-up to the Aug. 8-24 Olympics. In addition to worries over foreign terrorist plots, Beijing is also concerned about political protests from domestic critics.

China has already installed checkpoints on roads and subway stations around the capital, as well as areas which border Hebei province. Chinese authorities will close Beijing’s airport for about five hours during the opening ceremony of the Olympics, affecting dozens of flights, local media and airlines.

Hong Kong-based Cathay Pacific said it would postpone one flight after receiving word that the airport would be closed during the ceremony. Cathay Pacific said they were informed that Beijing Capital International Airport would be close from 7 pm to midnight on August 8. Air China said the airline had also received a notice that the airport would be closed.

Authorities have also cracked down on bars and performers. A warning for entertainers was reissued Thursday cautioning against acts that could tarnish the country’s cultivated image of order and control.