Here are the lines I am talking about,
My point is if Pakistan and China control some territory of Kashmir, why are they keeping those issues dangling for years rather than establishing international borders along those lines?
Politics Stack Exchange is a question and answer site for people interested in governments, policies, and political processes. It only takes a minute to sign up.Sign up to join this community
Simple answer: Politics
International Border is the line that both countries and the rest of the world have agreed upon. Both LOC and LOAC are unofficial control lines which are taken by the armies.This border is not accepted by either nations as official. India still wants to take back Pakistan-Occupied Kashmir and Aksai Chin while Pakistan wants to take the whole of Jammu and Kashmir and China wants Arunachal Pradesh which it considers to be Southern Tibet.
Now, let's be honest. All 3 countries, being nuclear powers themselves, know that a war in the 21st Century is not possible. Status quo is the only thing that establishes some sort of peace between the countries. However, all 3 countries have to satisfy the nationalistic fervour in their own countries. It has become an emotional issue in the democratic countries. In Indian terms, Kashmir is a "Brahmastara" (Invincible Weapon) for politicians. In either India or Pakistan, if any leader even tries to resolve it, they are just committing political suicide. Because resolving means negotiating and people on both sides of the border want absolute control and no negotiation.
There are many reasons.
Kashmir is used as a political weapon in the countries. Any yield or comprise would be political suicide.
The land occupied by Pakistan and China was occupied by force. If these borders were recognised, The Crimean occupation of Russia, China's occupation of the South China Sea, Houthi insurgency in Yemen, Syrian insurgency, Islamic State, etc. would have legal precedent to be recognised.
There is no point for the recognition and it would not directly benefit any of those countries.
EDIT: For references:
As you can see in both the wars Pakistan and China were the initiators, in fact, the Accession of Kashmir was forced as Kashmir was unable to defend itself, if Pakistan had not started the war, Kashmir may have been independent and this border dispute probably would not have happened.