Let me brief you the history of Kashmir.... at the time of partition (Pakistan/India) it was decided through census that all Muslim populated areas will be merged in Pakistan & Kashmir state was one of them but the time of partition the ruler of Kashmir who was Hindu deliberately delayed the merger till Indian forces took over from British Forces... since then people of Kashmir are struggling & fighting for their homeland.(Not familiar with the subject, did some reading and giving brief thoughts)
I suspect that Pakistan's fate is now tied to that of China's. If the Mainland were to go down, there'd be nothing to stop India to finally take over the disputed territories short of full on war. China's in no spot to go wade into the Kashmir issue right now when multiple interests are trying to tear apart the country. The PRC hasn't forgotten Pakistan, the all-weather friends they are, but fighting one battle at a time. If India were to push into actual Pakistan administered territory, I strongly believe there would be quiet words whispered to Modi that the Chinese would not tolerate it at all AKA military intervention.
There are several UN resolutions for the same (giving the right to Kashmiri people to chose their destiny) but India is constantly denying that, Kashmirs lost already 100k of lives for this cause but till now nothing has happened & now icing on the cake Modi govt impose curfew there and the whole state is under seige for than 70 days with out food/medical supplies/Phone & internet etc.
you can get more stuff on net for the same, while on other hand Pakistan is just asking the world to let people of Kashmir decide their fate as per UN resolution and nothing else....