Peter from beyond1200.com sent us the following:
Spotted this custom bike trailer on my way home from work the other evening (Nangang, Taipei). The push cart was just wrapped onto the rear rack. I'm not sure what the extra pole on the right on the rack is for though. Maybe a stabilizer.
I can imagine that with those small, hard wheels on the back, it must be a quite a symphony of sound to listen to as the rider pulls the trailer along.