清朝初年,准噶尔的大军及卫拉特蒙古熬茶礼佛的旅行都是从阿克赛钦进入西藏,清朝雍正时西藏甘丹颇章在此设立拓置局管辖。道光年间,拉达克王朝被查谟的多格拉人吞并,随后森巴战争导致其与清属西藏的冲突。1846年英国附庸查漠-克什米尔土邦建立后,英国东印度公司声称阿克赛钦应归英印政府统治。在未等清朝政府同意的情况下,為了标定拉达克和西藏的边界,英国于1865年派遣印度测量局官员威廉·詹森(英语:William Johnson (surveyor))潜入南疆地区,从拉达克进入阿克赛钦最后到达新疆的和田,通过勘察,绘制了一条界线,这就是詹森线(英语:Ardagh–Johnson Line)(中国大陸又譯“約翰遜線”)。此线将包括阿克赛钦在内的近三万平方公里的土地划给了英属印度,使阿克赛钦变成英印克什米尔的一部分,但當時由於同治陕甘回变,清政府並未控制此地區,英国政府沒有知会清政府。1899年,英國駐清朝公使竇納樂向清政府遞交了一份新疆和克什米爾劃界方案,依據馬繼業-竇訥樂線的拉宗山脈為分界,將阿克赛钦北部划給清朝,清政府沒有回應,英方將此視為默許[13] 。1950年代后期,中国在阿克赛钦地区修建新藏公路,印度以詹森線为依据表达不满,中印西段边界争端由此发酵。2020年6月,印度军方打破双方军长级会晤达成的共识,越过边境线,中方团长祁发宝携带数名官兵前来交涉。在交涉过程中印方围殴中国某陆军营长并致其死亡。据统计,5名中国士官在中印边境流血冲突中伤亡,20多名印度士兵丧生[14],中印关系急遽下降。
^LOK SABHA UNSTARRED QUESTION NO.3081 TO BE ANSWERED ON 12.12.2012. Ministry of External Affairs. 2019-12-12 [2019-12-28]. Will the Minister of EXTERNAL AFFAIRS be pleased to state: (a) whether the new E-passports of China show Arunachal Pradesh and Aksai Chin as part of China; (b) if so, the details of thereof and the response of the Indian Government in this regard; {...} (a) & (b) Recently, China started issuing new electronic passports which contain watermarks of a map of the People’s Republic of China (PRC), which depicts Arunachal Pradesh and Aksai Chin as part of China. Our Embassy and its Consulates General in China have started stamping a round seal of the map of India depicting our correct external boundaries on visas stamped on such passports.
^Map: Xinjiang China. Financial Times. 2018-03-13 [2019-12-30]. (原始内容存档于2019-10-09).(In the map, the Aksai Chin region is shown in grey whereas most of the territory of Xinjiang Uygur Autonomous Region is shown in blue-green.)
^James Barnard Calvin, Lieutenant Commander, U. S. Navy. The China-India Border War. Marine Corps Command and Staff College. April 1984 [2011-10-14]. (原始内容存档于2011-11-11).