evidence: - With China-Pakistan 1963 agreement, Pakistan handed over the Shaksgam Valley of Aksai Chin to China. [...] Shaksgam Valley - The Shaksgam Valley or the Trans Karakoram Tract is part of Hunza-Gilgit region of Pakistan Occupied Kashmir (POK), and is a disputed territory claimed by India but controlled by Pakistan. [...] - The Shaksgam Valley was ceded to China by Pakistan in 1963 when both countries signed a boundary agreement to settle their border differences.