Worst of those I encounter regularly is US sites trying to constrain your input to numbers only on certain fields.
Not "letting you input anything and marking it invalid if you put something other than a number", but listening to which key is pressed to allow the typing or not.
On French keyboards, typing a number requires the use of the SHIFT key. So I regularly need to change my keyboard layout just to type a couple numbers in a form field because someone thought they'd be smart...
Oh yeah I had that recently in a project (IE support required, so no type=number). When you try this, you will eventually find that you use so many keys during normal operation that a whitelist just isn't feasible. Left, right, tab, Home, End, Ctrl+C/V, Shift+Ins, …
Throwing away keys is never the right thing to do anyway. If the user typed 5y8 you don't know if they meant 58 or if the y was meant to be a 6 or 7 so the best thing to do is to have the field contain the full user input and higlight the input as invalid rather than silently guessing what the user meant.
Well engineers and scientists already have solutions that are sadly not already put in place in China.
A district heating company from the EU I worked for in China replaced 19 coal plants with a single one in a smaller city in the north of China. So good engineering and management already exist for that, but the government owns all the existing plants and you can't replace them without their "OK".
Same goes for cars. Chinese manufactured cars are not the most energy efficient, but mostly, there's lot of very old poorly made cars. Not the same very old as you'd get in other countries. Pretty horrible crap.
The type of oil used there for cars is also decided by government standards. The current one is "not great".
Many of those plants are decades old, and poorly managed. But they're also ran by state owned companies which means there's no market incentive towards efficiency and a huge amount of politics regarding what you do.
I worked almost 10 years ago for a European company doing district heating in China. In a smaller city in the north of China, they were able to replace the 19 existing coal plants with a single one.
