General information
Adapters, plugs, wall sockets and electrical current in China
Most North American countries and Japan use 110V electricity, while China uses 220V electricity. A voltage converter or transformer is needed in this case.
This is what most wall sockets look like these days in China. The top socket takes a two-prong plug. The prongs must be the same size ("Type A"), although many modern devices with Type A plugs have one wider prong. This type won't fit into a Chinese wall socket and will require an adapter.
This socket will also take a "Type C" or "Type F" plug that is standard in Germany. The bottom socket in the photo takes "Type I" plugs common in Australia and New Zealand. (All your devices will work if you're coming from Australia/NZ, as you use the same voltage as China.)