Perfect, can't get simpler and cleaner than this. Belt drive, fixed gear, two fixed gears actually! Shifter is tucked away in the pedal! And you don't even need brakes, well, I'd feel better with front brakes on actually.

With minimal maintenance, this should outlive you by a few decades..

Show this to a Chinese and the first thing they'd say is "how much?" .. ahh, Tài gúle, too expensive, and go back to their rusty 30kg bike without ever noticing anything about the bike's design.