I'm really amazed on these posts at first sight but annoyed the more often I read such a BS:
Why do you guys always think Pakistan is in the position to decide in regard to Chinese developed systems on what they get, and how? If they can go to ToT or simply purchase and even more this strange belief that everything is available and at best for free?
I reminds me on the early days of the Sin-Soviet relationship, where the strange consequence was the misbelief of the PRC’s leadership not only that China has a right to receive this all for nearly nothing, but also, that it was so much easy to develop modern combat aircraft and exactly the same is here: "just take the JF-17 and enlarge it; let us add a much larger, wider and more powerful engine - or at best even two of them -, let us add several more pylons, weapons and so on ... it's all that easy, just like updating a new App at the mobile.
You guys are really funny, but you should grew up, do your homework and learn to become realistic.