To theddo: in my two apartments in Shanghai over the years, I had as many as four different size plugs (UK three-pin type, two-pin US type (but with both pins same size, i.e., not polarized), European type, and a three-pin with slanted pins). And, three of these were in one apartment! I was told that China just hadn't decided on a standard, but was trending toward the European type. It was a pain buying electrical items for that apartment.