LAC is not a border. u r picturing it as such.
i repeat: the LAC is not a border. do u even know what 'LAC" stands for? LAC is subject to constant shifting- the stronger party takes all, the weaker 1 loses(n resorts to telling lies on the internet)
Rubbish.
LAC is based on the McMohan Line which is also your official border with Burma.
There is very little dispute in Ladak over where it falls. The bigger dispute is over Arunachal pradesh where you claim the whole state as south Tibet.
There are 3 agreements that define the LAC. The 1993 agreement, 1996 agreement and the 2013 agreement. And there is a mechanism in these agreements to handle alignment of LAC an that is by "joint checks".
Chinese action are in violation of these agreements and hence Indian's strong response.