Water is a key resource.
Most of the humans live in this area.
Most of the rivers in the area start in Tibet.
China controls Tibet.
Water is abundant now but it could be scarce sometime soon. If humans can’t manage energy and some even say energy is “scarce” when we have a huge infinite power of energy so near and multiple ways to get energy.
I can easily imagine how big water problems would be. Water can’t be produce magically from nothing.