Yeah, that's what is puzzling for us all. China is acting very timidly against Indian belligerence. India has been occupying Southern Tibet for so long now. In Ladakh, Indians tried to choke Chinese neck by cutting off CPEC route. Indians also planned to attack China and occupy Aksai Chin. Chinese actions so far are insufficient to say the least. Just occupying thin strips of land along the defunct LAC means nothing in strategic terms. Indians can still establish military basies there in the border areas (in Ladakh and elsewhere) and station the US/Israeli troops in those bases. Then attacking those bases and dislodging American troops will be deemed as an attack on the US. Indian northern border needs to be pushed back all the way back to Indian Punjab.
I was surprised at the non-existent Chinese reaction on Indian mischief of using Tibetans (in other words, Chinese rebels) for attacking Chinese forces (i.e. Chinese bloodshed on both sides). I expected Chinese blood on the boil for this extremely grave Indian offense and mischief against Chinese people. At the minimum what China could do was start actively supporting the ongoing insurgencies in seven NE sister states in Indian union. Since not much time is left for such an effort to bear the immediate results in the short term, Chinese should have occupied the Indian Siliguri neck to cut off the seven sister states from Indian union. That way, Chinese can get rid of their ever lingering issue of Southern Tibet and Ladakh and remove any threat to the CPEC once and for all. Consistent Indian mischief, offense, and aggression needs to be punished.