In absolute terms, China installs about as much nuclear as the US does solar. So I can only assume you agree with the statement "the US is bringing on an insane amount of solar energy"? Because, once again in absolute terms, the US's solar buildout is trounced by China's. The US is losing the energy race, and nuclear isn't going to save it. The US will run out of fissile material before China runs out of sunlight.
Depends if they start seeding clouds and doing geo engineering.
Nuclear and solar are different energy products that are complementary. This solar vs nuclear narrative is basic and anti progress.
For example china invested in solar so they can transition their energy system and get it paid by selling globally via subsidized cell manufacturing.
I don't think they will be able to sell export their nuclear tech globally since it is essentially repackaged US tech.
But yeah Im all for solar - more solar the better but it cant do firm power well.
There's really no risk of running out of fissile material. We can create it.