This is just fucking absurd. Are you serious suggesting its remotely possible the Chinese government would release a deadly bioweapon in their own city without even developing and distributing a vaccine first? Because I don't think anyone is suggesting that, but maybe I'm not following the same news sources that you are.
To be clear, I don't think they would develop a vaccine and virus first either, but the idea of "just release it lol" is pants on head crazy.