On: Scientists develop ‘cheap and easy’ method to extr...

[dredmorbius]

If so, that was stated quite unclearly.

Though yes, the thought occurred after I'd posted.

Per capita car ownership might help tease that out (along with sales of car substitutes).

US car ownership is 804 vehicles per 1,000. In China it's 204 vehicles/1,000 pop.

Wikipedia's Transport in China page could use some updating, but also fails to support OP's claims:

https://en.wikipedia.org/wiki/Transport_in_China#Road

[hedora → dredmorbius]

According to that article, total car ownership in 2003 was equal to one year of sales of motorized bikes.

[dredmorbius → hedora]

And what fraction of motorised bikes are electric?

Again, your original claim doesn't stand to any evidence I've found.

You've presented none yourself.