Often times, if the weather is nice in Beijing, I'll take a little stroll to a nearby restaurant for lunch. So it was when I found this bike In an apartment compound near my office.
From the first pic we can see a few things.
1. It is a side-by-side with two driven wheels,so the passenger also pedals.
2. It has two child seats. This is odd as of course, there must be special circumstances for you to have two children in China: Twins, Ethnic minority, etc.
3. It's completely home fabricated, but the base bike seems to be a good old brake rod roadster, possible a FlyingPigeon. I make this assessment based on the black "FP" style seat.
Note the fork trusses and interesting reflector (Not a light). You can also see on the rear wheel that this bike sports a gearhub!

Child seat #1 has a second set of non-operable handlebars.
Child seat #2 has a steering wheel to help keep everyone entertained. Nice touch.
A couple of welded on baskets makes for a convenient "Trunk". This shot also allows you to see the wheel size of the right side "Bike". Looks like it was based off a folding bike.
Ingenuity knows no bounds. I'd love to see this bike in motion.