The reorganization of at least two Group Armies along Soviet Unified Army Corps (Operational Maneouvre Group) lines with 2 Armoured Brigades and 2 Mechanized Brigades (themselves organized along US Army Stryker Brigade Combat Team lines) each and a brigade each of artilley, and engineers along with an air defence battalion, etc., indicates a very deliberate and concerted attempt by the PLA to reorganize for Combined Arms operations par excellence. The two Group Armies concerned would in effect each be the equivalent of a reinforced Western Armoured Division, potentially very powerful.
There are at least two questions that remain to be answered, however. The first is whether the PLA has achieved a basic maturity in combined arms operations at least the tactical and preferably, the operational level, as well. If not, and what information is coming out seems to suggest that the PLA is still shaky in combined arms warfare even at the tactical level (while these photos are probably just for show, what photos of Combined Arms exercises that do come out of China seem to show an unfamiliarity between the combat arms with each other), let alone the operational level, then the new Group Army structure may at least encourage greater Combined Arms training and familiarity.
Granted, many of these photos may just be for show, and tell us relatively little about the true capabilities of the PLA. But I tell you, if these photos do show, more or less, what the PLA is presently capable of in the realm of Combined Arms warfare, then someone ought to tell the Central Military Commission and the General Staff Department that whatever they are doing, this isn't the way to do it.
If what the PLA is doing is copying foreign (and especially Western) and disparate concepts and then jumbling them together into a made-in-China whole, then it seems to be showing in the photos we're getting.
The second question is what models of Combined Arms operations is the PLA following? As the new Group Army concept seems to show, the PLA seems to be cobbling together different concepts from different sources into a new synthesis. The two most obvious models appear to be the Soviet Unified Army Corps concept and the US Army Stryker Brigade Combat Team concept.
The Soviet UAC (or Operational Manoeuvre Group as NATO called it) was purely offensive, designed to exploit (or even make if necessary, then exploit) a penetration of the enemy front lines and proceed to tear up the enemy's rear areas (headquarters, fire support, logistics trains, bases, lines-of-communication, etc.).
The US Army Stryker Brigade Combat Team epitomizes the "Netcentric Warfare" concept that has started in the US Army and been enthusiastically adopted by the PLA - the basic idea being that one can do more with less provided the proper digital informations systems, links, and procedures are in place - and thus discard traditional formation structures and reduce force sizes.
To the extent that I can perceive any other major foreign concept here, I discern a (sort of) return to an "ideal" WWII German Army Panzerkorps (rarely if ever achieved by the Germans themselves) with 2 Armoured formations and 2 Mechanized/Motorized Formations. In this concept, the Armoured Brigades (presumably) would spearhead the offensive and the Mechanized Brigades would follow in their wake to mop up bypassed centres of resistance, freeing up the Armoured Brigades for exploitation and pursuit.
Either the PLA does not recognize the incompatibilities, never mind the weaknesses, inherent in its amalgamation of these disparate concepts, or it is convinced that by copying and combining the most advanced Combined Arms concepts of other practitioners of Combined Arms warfare together with the adoption of the technologies that these require, it can both mitigate its own relative lack of experience in this area as well as get in on the cutting edge of Combined Arms warfare by doing so.
Aside from the photos that have been released by the PLA, and these seem to show a shaky mastery of Combined Arms warfare at the tactical level, there is another source of evidence that suggests that the PLA may not grasp the full import of problems at either the tactical or the operational levels. And that is from the organization of the Group Armies themselves. Unless the PLA intends to use them just as the Soviets intended to use their UAC's (that is, as specialized exploitation forces designed to wreak havoc in the enemy rear, rather than to physically destroy the enemy's main forces) in which case a proportion of several Group Armies structured in a more traditional configuration to each UAC-type Group Army would be required. As is, and especially with the Mechanized Brigades being reorganized somewhat along US Army Stryker Brigade Combat Team lines (thus lacking much of the sheer infantry manpower to mop up bypassed enemy centres of resistence and to hold ground won by the Armoured Brigades - A WWII German Panzerkorps concept), it would be doubly difficult to clear and hold ground given the overall organization of the Group Army along UAC lines.
As the Germans discovered in WWII (and their opponents later in the war as well), Heavy ground units must have a proportion of infantry units to armour units of 2 to 1, no more, no less, under almost any circumstances - fighting in open or close country, on steppes or in cities, on offense or defense - and Heavy units must not only be able to win ground in order to destroy the enemy, but also to hold it - and this proved to be the fly in the ointment for German Panzerdivisionen and Panzergrenadierdivisionen, the former could not hold the ground it had taken, and the latter could not be present in sufficient quantity due to the competition for resources between the two types of divisions, and subsequently much of the Soviet Army, even though defeated and surrounded, was still able to escape to fight another day. The Germans also discovered that the Panzergreandierdivisionen were incapable of mobile defensive operations (in order to free up the Panzerdivisionen for counter-attacks, in theory at least) withpout suffering crippling losses in the face of enemy armoured formations.
The German solution (and it worked to the extent that such divisions were available, and failed to the extent that there weren't enough of them) was to restructure the Armoured Division (Panzerdivision) with a ration of 2 Infantry Companies for each Armoured Company. 2 regiments of panzergrenadiers and 1 regiment of panzers, properly structured into ad hoc Battle Groups (Kampfgruppen) according to the tactical situation gave an almost perfectly balanced division fully capable of offensive and defensive operations in almost any terrain. The Mechanized/Motorized Divisions (Panzergrenadierdivision) that had been created to complement the Panzer Divisions were left in practice to wither away.
The PLA is in danger of making the same initial mistakes as the Germans, and adding to that errors or misunderstood or -applied concepts from other quarters to them. The PLA does not (so far as I can tell) seem to recognize this so far.