You know, such aggression and day to day LAC or LOC breach is pretty normal. There are many such things which civilians like you me and others aren't aware of at all and have happened which if in public comes could lead to war hysteria. Your Army , Indian Army and Chinese Army knows very well what to leak into media and what not. Some news are deliberately leaked when required for x y or z reasons.
In regional skirmish, neither Pakistan wants nor China and not even India wants that any other takes advantage and this is why China will not support you openly in case of conflict with India. Because that leads to some one else entering the region.
What do you think, your ISI is not countering the Chinese? Who knows your generals have fixed a deal with Indians to counter China in Pakistan so that they can't expand much