Chinese Province Larger Than Texas Just Ran for a Week on Only Renewable Energy

Not scalable to other Chinese provinces, as most Chinese provinces have WAY MORE than 5.8 million people...<p>&quot;These renewable energy sources reportedly provided Qinghai and its population of 5.8 million with 1.1 billion kilowatt hours of electricity — equal to about 535,000 tons of coal.&quot;

I recall there used to be an argument around base-load generation not being fully suitable to be provided by renewables... That argument seems to have subsided however with reports like this. Can someone ELI5 what&#x27;s changed?