China Electricity Converters and Adapters
The electricity in China is generally 220V, 50 hertz (HZ), AC. Note, Hong Kong is 200V and Taiwan is 110V.
If you travel to China and wish to bring electric devices for use during your stay, an electricity converter or adapter, which can be bought in China for a couple hundred yuan, is necessary. While some of the hotels in China may have both a 110V and 220V electrical power outlets in the bathroom areas, in the main portions of the guest room only 220V sockets are available and you will need a power converter for your electrical device. Also, depending on where you travel to China, the electrical system is still a work in process and it is better to be safe with the proper converters and plugs.
As the shape of plugs also varies between countries, a portable plug converter may also be necessary.