A 100 J-16's?Pakistan needs to get around 100 J-16s to defend its border. J-16 is more capable fighter jet than J-10 and more stealthy as well. China won't sell J-20s or J-31 anytime soon so J-16s are probably the best fighter China can sell.
How to you plan on financing 'em - let alone keep 'em flying.
Not certain how JetA-1 Fuel works, but it is my belief that dual-engines + the weight of the Jet requires more than a conventional single engine like the ones in our inventory.
Any clue the difference in price tag between the J-16 & the J-10...
Bottomline, J-16 is never going to be an option for PAF. I know a lot of guys here talk about its possibilities, but their dreams are in line with F-35's from the US. Lets try to stay on Planet Earth for once.