1000sq km?
not a single inch territory captured, dispute happened at neutral perception of LAC in no mans zone. Not in main territory where the border outpost of Indian army is deployed.
Disengagement happened from some areas & still going on.
In pangong tso, for example china claims & patrolled up to finger 4 and india to finger 8. current buffer is f4 to f8.And China used to patrol till F-4. They can no longer come there either. In depsang, india is blocked from its patrol points 8km east of y-junction while china blocked from its point 7km west of y-junction. both deny each other access
India's on paper LAC claim is 18km east of y-junction in what is historically Pla controlled territory. Which is why Indian troops only asserted control up to 8km east of y-junction via patrols. If china had a upper hand it would have escalated in ladakh rather than withdrawing from pangong tso and continuing to be denied access to its patrol line near burtse in depsang. also note all remaining friction points r where india is also denying china access to pla patrol points