India is a vast country.
Do let us know which parts you plan to visit.

Indeed. My plan is Mumbai-Bangalore-Chennai-Pondicherry
Here comes the reason why I like bitcoins:
How can I convert CNY to INR?
I think your best bet is to use your Chinese ATM card within India to withdraw INR. Other than that, you will have to exchange bitcoins for INR cash. If you are in Bangalore, probably one of the bitcoin companies here can help you.