The agreement led china and Pakistan to withdraw from about 1,900 square kilometers of territory (750 square miles) and a border based on the 1899 British note to China, modified by Lord Curzon in 1905. Indian writers insisted that, in this transaction, Pakistan ceded 5,300 km2 (2,050 square miles) of territory to China (which they believe had absolutely no right). Indeed, if at all, Pakistan has gained some territory, about 52 km2 (20 square miles), south of the Khunjerab Pass. [Neutrality is controversial] The claim abandoned by Pakistan was the area north of the Uprang Jilga River, which also included the Raksam lands, where the Mir of Hunza had enjoyed tax rights and pastures for much of the late nineteenth century under agreements with the Chinese authorities in Sinkiang. Despite this, sovereignty over the territory has never been questioned by the Mir of Hunza, the British or the state of Jammu and Kashmir.  The Pakistan-China Border Agreement on the completion of the Pakistan-China border was signed in March 1963. This agreement has become quite controversial because India has refused to recognize it because it also claims sovereignty over some of these territories. In addition to this controversy, the agreement changed the regional balance by bringing Pakistan and China closer together, while weighing on pakistan-US relations. In seven decades, independent India and Communist China failed to agree on a fully demarcated border. India and China claim the Aksai Chin Plateau, part of the western sector of the border region.
India considers it part of the Union Territory of Ladakh, which was adopted on August 5 from the state of Jammu and Kashmir. China considers the plateau to be part of its province of Xinjiang and Tibet. In the eastern sector, China claims Arunachal Pradesh, which is marked on its maps as southern Tibet. The deal has enjoyed a moderate economic benefit for Pakistan, which has been granted pasture under the deal, but is of far greater political importance, as it has both reduced the risk of conflict between China and Pakistan and, as Syed suggests, „China has formally and firmly declared that Kashmir is not yet part of India.  Time, which reported on the issue in 1963, said that by signing the agreement, Pakistan had further „stifled“ hopes for a settlement of the Kashmir conflict between Pakistan and India. Under this Sino-Pakistani agreement, Pakistani control of part of northern Kashmir has been recognized by China.  After 1945, a paint wash in the maps of the Indian Inquiry involved a claim to Aksai Chin on the northeastern edge of the princely state of Dogra, Hoffmann adds, but the British army hesitated to defend that border. . .