I lived in Shenzhen for 5 years. HuaQiangBei was an intense place. You could find any component for anything you would want to build. Literally skyscrapers full of those little booths selling anything you'd want.
You would see people going in with a spec sheet for a computer they wanted to build and hours later they come out with a stack of stuff that they'll take home and assemble. It's a really incredible place.
Sent from my SAMSUNG-SM-G891A using Tapatalk