It's a recurring phenomenon every few years.
China doesn't have district heating in Shanghai, and further south, despite climate at around Shanghai latitudes being quit cold. This leads to everybody using electric heaters.
It's like the Texas electricity crisis in USA, except it happens every relatively cold winter in China.
Is it really that big of a problem, then? If so, couldn't the government regulate use of electric heating? It's not like water pipes bursting is a huge risk.
Shanghai is one of those edge climates where it's not quite cold enough to do something about the cold, but just cold enough to be uncomfortable and deploy a band-aid fix.
So they don't make real investments in climate control and everyone is cold and/or wears sweaters in the office and/or deploys electric heaters ...
So... early winter is not the cause this year. Even quite far up north, it's quite warm this year.
I just did a double take as it’s still late summer/early fall so still relatively warm.
Good or bad choice I'll leave that to everyone else to decide (wouldn't cost China much to just do ... nothing) but I think it's human nature to some extent.