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Blue line is where China actually controls up to. Red shaded is the remaining 20% of dispute. 80% of historic dispute was settled already after 1962 but still claimed formally by India. To see the full 100% this map needs to be zoomed out a fair bit.
India captured what exactly where and when??
Fact. India has not been even close to the blue line.
Fact. Both sides have gone into red zone (20% dispute). China says India has patrolled red zone much more (also said by India's own 4 star general) and acted with PLA push from F8 to F4 and occupied it for a whole year. India says China has been building up. Both sides have been building up on their side (not in red zone) and China has built one road from F5 to F8 inside red zone as this confrontation built up.
India has already lost 80%. It wants this red zone (20%). It wants more in fact and wants Aksai Chin. This land is more Chinese than it is Indian. While it's strategically much more important for India, China has a slightly better historic claim.
Black top is slightly more east than Helmet top but that's as deep into the red zone as India is now at south of pangong lake. The further intrusion done back in Oct 2020, was quickly responded to by PLA and the Indians pushed out back to Black top and Helmet top, both well on the left half of the red zone, south of Pangong lake while PLA is beyond half way point at this spot. North of Pangong lake, India is beyond half way line of red zone and PLA is on the eastern half.