You do realize that Indus's water is reserved for Pakistan ( minus our cut ) as per IWT, right? Any adventure by China on this river, will give us a free hand in blocking all water from this river ( and perhaps rest two as well depending on our mood ) to flow into Pakistan, which has been collected in our catchment area. ( Google catchment area of rivers. Will help you in understanding my next point regarding Brahmputra).
If China opts for any adventure, you won't have any water left to block buddy. and and as long as we get our water as per the IWT, that's all that we care about. Discarding iwt by india will result in steps taken by Pakistan and even China that india just could not survive.
80% of catchment area of Brahmputra lies in our territory. China blocking the river at Brahmputra, will give us a reason to block water from flowing into Bangladesh. Our loss will be minimum, while Bangladesh will be severely hit. Guess, who will be blamed for this ?
Yeah that's between you and bangladesh, not our problem. I'll let them deal with it.
and BTW China has not yet blocked Brahmaputra. Neither does it plan to. You have so much to learn.
Oh but China has already blocked it, what planet are you living on? Now sure, they release it time to time but it's on their schedule, not yours. That's why india is very much at China's mercy.