These are solid-fueled rockets (as are almost all new ballistic missiles since the 70s), they can be stored fueled for a looong time. No reason China wouldn't have and use these fuels.
That being said, parade launchers are probably empty because why risk anything here.
You are weak and not fit to serve in the revolutionary avonguearde. As a real hexbear newshead I watch almost every episode, only breaks allowed when I'm sick or something.
You should start listening daily ASAP, it will also clear all sexual urges from your bourgeuois body as well.