I don't think you can use such a generic map to prove your point lol. Besides the 1000 to 4000 square kilometers of territory lost is coming from Indian sources, not Chinese ones.
But as you said, the territory India ceded to China this summer was Chinese to begin with anyway lol.
That map was created based on satellite images by a researcher at
. We all know that ASPI would take every opportunity to promote the China threat and if China had crossed "the LAC" (as recognized by most sources), you can bet they will be all over it calling it proof of Chinese aggression.
Various Indian claims of X amount of territory being seized by China are all based on the Indian perception of the LAC. The fact that these claims vary so much between Indian sources (4000 vs 1000 sq km, and 0 according to Modi) should tell you that the so called Indian perception of the LAC is pure nonsense.
To claim an area to be under your actual control, any reasonable person would say that requires you, at a minimum, to be present in the claimed area at least about as frequently as any other claimant. That is not the case for the Indian perception of the LAC. Many of India's supposed patrol points are rarely reached by Indian patrols as they are met and stopped by Chinese border forces before reaching those points. Some are not reached by Indian patrols for years at a time and yet India perceives them to be under their "actual control". Even more ridiculous, the so called Indian perception of the LAC actually extends beyond these rarely reached patrol points, into areas that have not been reached by any Indian at all since the 1962 war. The Depsang plains area is a great example of this.
Most PPs are close to the LAC, however
in area, the PPs still remain well inside, despite having been revised a number of times.
...
PPs within the LAC and the patrol routes that join them are known as '
limits of patrolling'. Some army officers call this the "
LAC within the LAC" or
the actual LAC
So not only is there an Indian perception of the "LAC", there is also an Indian perception of the "actual LAC". They either forgot what the A in LAC stood for, or maybe they just don't know what "actual" means.
The Indian government claims that
Chinese troops continue to illegally enter the area hundreds of times every year. Most of these occur without incident
While India has been unable to patrol most of the Depsang plains area since 1962, there are hundreds of unopposed Chinese patrols in the area every year (so basically regular daily Chinese patrols). Somehow, this area in the Indian perception is under their "actual control".
The fact of the matter is, the areas that Indian sources are now accusing China of seizing from India over the last year were never under Indian control in the first place.