Well putting six CJ-10 on the H-6K is about demonstrating the full capabilities of the bomber. This is different from mobilizing nearly 1/4 of the country's WZ-10s for just one parade. According to IISS, China only has less than 100 WZ-10s in frontline service. If the Chinese are serious about scaring the shit out of Abe, they only need one formation of WZ-10s, but all of them should carry at least 8 HJ-10s and the most recent multiple rocket launchers. However, I could be wrong because the sheer number might be a way to show off in front of the ordinary Chinese audiences, who know little about modern military technologies (like North Korean wasting money and fuel showing off tons of fake plastic missiles during its last parade, except the Chinese ones are real).
At this point I think it's about 96 to 120 Z-10s, with eight to ten squadrons for the same number of brigades/regiments (and remember WZ-10 isn't the real designation of the helicopter). I see 9 Z-10s in a single formation from what I can see in the parade, maybe two at most, which could. There's another squadron of Z-19s or two as well (similarly there's likely 96-120 Z-19s in service by now as well).
As for arming either H-6Ks or Z-10s -- remember this is a
parade. Parades are
meant to be a dog and pony show, demonstrating potential combat capability in a celebratory way to a general audience.
Most nations do not arm their combat aircraft to completely full payloads even during military exercises, so why would they arm them with live munitions or even dummy munitions for a military parade?
The only reason it would make sense to arm these aircraft during a parade is if they were to immediately go to war straight after the parade.
So yes, for the purposes of a parade you absolutely do have your priorities mixed. There is no need to give any of the aircraft or tanks or whatever any form of actual munitions (or even the troops any real bullets), but there is absolutely a reason to fly or roll or march an impressive number of planes or AFVs or soldiers across the stage.
For an airshow (usually via static display), or for a demonstration to potential export customers, it makes sense to equip one's aircraft as impressively as possible, given the extra scrutiny and the interest paid to individual aircraft.
As for military parades, it's fairly standard practice for a variety of nations. India, Russia, South Korea all dabble as well. Even the UK still does extensive military pageants for the queen.