To be able to use blitzkrieg, CSD or whatever anyone terms it, the commanders need the following things in their favour.
1) Tactical suprise.
2) Local if not theatre level superiority in terms of troop numbers and equipment.
3) Effective CAS and air superiority
4) secure Supplies and reinforcement.
The CSD and the Blitzkrieg are dependent on these 4 pillars. Without one, the offensive collapses. The Chinese do have superiority in terms of number of troops and equipment. But it is not at a level to satisfy the minimum requirements needed, especially given the mountaneous terrain.
They can generate the required numbers by moving divisions from the mainland, but then they lose the 1st objective, i.e. Suprise. To add to that the soldiers need to acclamatise in order to be able to fight. This again requires a week at the minimum.
CAS is very difficult, as is artillery support. The mountaneous terrain is a nightmare for PGMs and CMs alike, and only our BRAHMOS has been modified to engage targets behind the mountain. Then there is the problem of differentiating the friendlies from the enemies engaged. Normally the airstrikes preceed the actual attack, but in CSD, it will call for CAS, that too danger close to destroy any obstacle. In plains it is a problem, in mountains it will be a nightmate.
Then the issue of supplies arises. Surely the Chinese will not achieve their objective in 72-96 hrs, to enable them to fight without any logistics backup.
Thus as I said, both sides are locked up, and neither has any overwhelming advantage over the other.