Fisa courts are a process to obtain search warrants. They don't try suspects. If a warrant resulted in information that led to charges, they would be indicted by a grand jury and that would then lead to a public jury trial. You're also changing the subject because you're clearly wrong here and don't want to admit it, or more likely just arguing in bad faith. You said it was the "world standard" to strip someone of a right to trial by jury if it involved national security information. And that's obviously untrue. Hong Kong (until China changed it) and the USA are two such places where it is not the standard. Some quick internet searching would show you many countries in the world protect a right to trial by jury, even in cases involving national security information. Which I really doubt is the case here, more likely some pretext by the Chinese government so they can continue to persecute any political opposition to their one party authoritarian rule. Just because China decided to not grant their citizens a trial by jury right does not mean it is the standard in the whole world. Don't conflate the two.
You're saying that what the UK did in 1973 in was wrong? So China should copy that wrong and withhold a right to trial by jury from their citizens to persecute political prisoners as well? Weird take but alright, if that's your viewpoint. Enjoy authoritarianism.