Still a very large requirement for tanks. Between 27 and 33 Heavy Combined Arms Brigades, a Mechanised Brigade (ZTQ-15), and a number of Heavy Combined Arms Regiments in the independent Divisions. And this is just the regular force.
Yes there is large requirement, but using open source available information there are roughly 1300 of the ZTZ99-series tanks, roughly 2500 of the ZTZ-96 series tanks and roughly 500 of the ZTQ15 tanks.
That is roughly 4300 tanks.
Using the 33x CAB and the couple of HVY CA Regts requirements (112 tanks in each CAB : each CAB has 4x BN, each BN has 2x Tank companies of 10-14 tanks), that meets the requirement and a few more, right?
The roughly 500 ZTQ15 is enough along for 4 CABs and have a few for the PLANMC.
Now given open source assumes for errors, we may have a few ZTZ79s out there, but it is extremely unlikely there are ZTZ59/ZTZ69 tanks left in the PLA.