And what would they do with that? They can't package solar-harvested energy and export it to China. They can provide regional power during daytime - but probably for more money than oil/gas ... and they will still need to rely on oil/gas for base-load, mornings, evenings and night-time.
Yes, they can. Bulk industrial chemicals are portable and extremely energy intensive [1].
[1] https://www.eia.gov/energyexplained/use-of-energy/industry.p...
Essentially that's what aluminum refining from bauxite does.
It's also not impossible to build long distance transmission lines that far, but that's a big infrastructure project across an unstable region and the highest mountain range on earth.
Usually electricity cost doesn't dominate the equation, so it makes sense to run 24/7 (or as close to that as you can get).
Aluminium refining is different, but usually those plants buy dedicated electric capacity from a hydro station at special wholesale rates. It does not lend itself to starting and stopping.
It's not storing the energy, it's making energy storage and transport a redundant step.
Canada for example, was and still is, a major destination for bauxite ore. There are large hydroelectric dams in Quebec dedicated specifically to aluminum smelting.
If it was easy, there would be no debate, and probably no opportunity.