Why not dropping that to the Sahara or to any remote desert that nobody lives?
Even if China allow them to dump the water into the Gobi desert, it'd still cost billions of dollar to build and operate the pipeline. It'd never happen.
"it could affect all the life that live there and consequently human life that feeds of it" is not supported by any science, it's just fear, the same fear that leads us to keep running coal power plants that kill people on a daily basis.