One correction: 5 x 32 = 160, not 714
The overall figure is around ~500 tanks theoretically to be moved in one sortie. That isen't even two divisions...but before you even get your eyes fixed on that number, here's few things that you need to take under consideration.
The number was just the tanks, it didn't include the mens and more importantly all the other elements of tank divisions. DOes anyone have any clue just how much equipment a single motorized or armoured division requires? A single towed artillery battery (company size unit) requires around 10-12 trucks, not to mention of the entire divisional artillery regiment. Add the guns and the artillery units of the tank/infantry regiments. And thats just the artillery...airdefence, engineers and other supporting units of the divisions requires at least the same ammount of vehicles so in overall the tanks and ACPs are barely the half of the total required vehicles and units of the divison.
And we still haven't counted the mens...these chinese amphibious ships are basicly the old WWII type LSTs which have quite limited capability to transport large units. If you wish to beach units that actually have some value in the combatfield, those numbers that were listed will drop considerably.
So even in theoretically (in real life, not in some battlefield 2.0 computer game) the current amphibious capability of PLAN is only capaple of transporting barely one motorized division size unit in one sortie. Is it sufficient enough? Depends what you are trying to invade. Spratly ilands mayby, but for example Taiwan? Well just think about it yourself, can one division take and hold a bridge-end with reinforcements coming in the size of one division and in the rate of what ever it takes to get those ships back to the mainland, load up and head back to the sea (and decreasing as the landing force will take damages) against an army sized opponent??
The current and past chinese amphibious capability is not even near the level which would be required if you wish to conduct operations of the size and scale as Taiwan invasion would require. Even the new LPDs that are about to enter service (and to operational service) in the following decades wont be enough, you need at least the size of USMC, and even it may proove to be insufficient...