Our biggest chock point to checkmate China is Andaman Nicobar Islands. It starts from 300 k.m south from BD and ends 200 km north of Indonesia. We have started investing heavily there. China does any mischief and all its sea supply cut off.
2 naval bases India are very important. INS varsha in east and INS Karvar on west. They are by and large secret. I will write about them some time in future.