UPDATE: I’ve been asked by several people how they can get in touch with factories so they can go on tours. Please DON’T DO THIS unless you are serious about doing business with that company. Factories are not amusement parks, and the staff who work in them are busy doing their jobs. If you want to manufacture a product and you seriously want to do business with a factory, then it’s easy to arrange a tour. But don’t do it just because you want to have a look! That wastes their time.
ITEAD, makers of the super-popular Sonoff home automation devices, very generously allowed me to visit their head office, their factory, and their warehouse so that I could see how the Sonoff is made.
Come with me on a quick trip to China to learn a little about the amazing city of Shenzhen, see its enormous electronics markets, and go inside the Sonoff factory to watch them progress from a bare PCB to a finished product.