Re: ultralight/moped anyone?
Until there is some tremendous breakthrough in drag reduction, a china motor alone will not provide enough power for takeoff.
However, you may be able to takeoff with a combination of leg and china power.
The Gossamer Albatross flew across the English Channel in 1979 on human power.
Carbon fiber has become a little cheaper since.
“You're only young once, but you can be immature as long as you like" -Unknown