Thought this topic is banned over in Chinese Forum for its stupidity. Now it's resurreted here?? lol.
In reality, it's IMPOSSIBLE to roll all the way to India from China in 48 hours even with mobile corps.
You may think it's just 300km, if I drive 60k/h, which is highway speed, I would have reach it in 5 hours. But in war, you don't drivelike you are cruising in a sport car.
Driving a car curising around and driving a tank in a column getting fired at all along the way is different. There are a lot of issue one have to consider, from logistic, supporting element, roadblock, damage repair (both your unit and infrastructure) and traffic jam. In war, 4 miles (about 7 KM) an hour is actually quite impressive.
In reality, most Airborne/Armored operation take way longer than 48 hours, the cloest one is operation Market Garden, for which XVIII AIrborne Corp and XXX Armored Corp took 8 days (192 hours) to cover 90 km from Belgium into Arnhem. In a peer to peer situation with restricted road access, you will probably get 1 KM per hour. In this case, it's 400 meters per day hour.
for a Peer/Non-Peer situation, the US 3ID took 18 days to ride all the way from Kuwait to Baghdad, that's about 550KM, so it averaged about 1.27 KM per day hour.
Also, Airborne force is considered a light force, you can of course drop 20,000 airborne troop into India in 10 hours (given they are not going to be shot down) but without support, they will probably just going to be slaughtered and killed.
THe only way Chinese troop can reach India in 48 hours is as if they all applied visa and travel by car or train, otherwise it's kind of a pipedream to think the troop can reach that far that quick.