The border between China and Pakistan had never been demarcated before. Both parties agreed to do so on the basis of tradition. The agreement, which starts from the north-western border of Pakistan at an altitude of 5,630 meters, passes from this point to the east, then southeast along the main tributaries of the Tashkurgan River, on the one hand to the tributes of the Hunza River of the Indus River on the other side, by Kilik Daban, mintake Daban, Kharchanai Daban, Kharchana daban. , the Mutsgila Daban and the Parpik Pass reach Khunjerab Daban. For Pakistan, which had disputes between residents on its eastern and western borders, the agreement made the task easier by protecting its northern border from future competition. The treaty also provided for a clear demarcation of the border with Pakistan, which would continue to serve as a border, even after the settlement of the Kashmir dispute.  The Pakistan-China border agreement for the Pakistan-China border was signed in March 1963. This agreement has become quite controversial because of India`s refusal to recognize it, because it also claims sovereignty over some of the territories. In addition to this controversy, the agreement has altered the regional balance by bringing Pakistan and China closer together, while weighing on Pakistan-U.S. relations. The agreement led China and Pakistan to withdraw from about 1,900 square kilometers of territory and a border based on the British note of 1899 to China, as amended in 1905 by Lord Curzon. Indian writers insisted that Pakistan had ceded 5,300 km2 of territory to China (to which they believe it had no rights). In fact, if ever, Pakistan has gained some territory, about 52 km2 (20 sq mi), south of the Khunjerab pass.
[Neutrality is controversial] The claim of Pakistan was abandoned, was the area north of the River Uprang Jilga, which also enjoyed the plots of Raksam, where the Mir of Hunza had tax and grazing rights for much of the late 19th century under agreements with the Chinese authorities in Sinkiang. Despite this, I have never questioned the sovereignty over the territory by Hunza, the British or the State of Jammu and Kashmir.  The volume of trade under agreements between the two states amounted to $13 billion in 2013 and reached $20 billion in 2017, when the two countries signed 51 agreements and Memorandums of Understanding for cooperation in various areas.  China had already made a significant contribution to Pakistani imports prior to the signing of the free trade agreement and improved considerably after the implementation of the free trade agreement in 2007. Until 2012, it was the source of 15% of Pakistan`s total imports from the world, up from 9.8% in 2006.   Pakistan had expressed some reservations, as Chinese maps showed parts of Pakistan on their side. Ayub Khan asked for clarification, but no response was received. After Pakistan`s vote to place a seat of China on the UN Security Council, the Chinese withdrew their cards in January 1962 and agreed to start discussions on the subject.
Pakistan has welcomed its willingness to reach an agreement. Talks between the two sides officially began on 13 October 1962 and resulted in an agreement signed on 2 March 1963 by Foreign Ministers Chen Yi and Zulfiqar Ali Bhutto of China and Pakistan respectively. As a result, China withdrew from the disputed area following a complaint by Pakistan. It demonstrated the aspirations of the people of both countries for the growth of friendly and fraternal relations that, in the years to come, had to play an aiding role in ensuring world peace.