It looks like of all the drones shown, all of them real bar the two smaller CCA drones. Assuming what they said is true, the GJ-21 UCAV, the GJ-2 variant, naval rotary UAV, and the two larger CCAs are real. The smaller CCAs appear to be model mockups, but not sure.
Whyt makes you think the GJ-21 are real? IMO they are too crude … just look at the intake, exhaust, landing gears …