It seems like Jiang makes very non-committal, broad sweeping and already pretty likely geopolitical predictions that are open up for interpretation. He will also set up the prediction as so if it were to slightly change upon the event occurring, he could then retroactively tweak the original prediction to make it align to the result.
This is how mediums and psychics work. He isn’t saying anything profound. He has a fairly good idea of geopolitics and leverages this knowledge and his experience in teaching to impose an impression of expertise on his students and listeners. He then makes very broad non-committal predictions that can be altered.
The fact that Professor Jiang leans into his nostradamus-like persona, is the exact reason why he shouldn’t be trusted. The real geopolitical scientists and experts work don’t entertain predictions for the sake of their ego or image, rather they accept the complexity and ever-changing nature of geopolitics and relay facts in order to discuss possibilities. Jiang engages in too much specificity and concrete predictions