Detailed Explanation of Voltage and Socket Types in China

1. Voltage Standards

• The standard voltage in Mainland China is 220V, with a frequency of 50Hz. This standard applies to all civilian power supply scenarios (including hotels, homes, public places, etc.).
• Differences with other countries:
• The United States, Canada, Japan, and other countries typically use 110-120V voltage, so tourists from these regions need to pay special attention to electrical compatibility.
• Most European countries also use 220-240V, but with a frequency of 50Hz, which is consistent with China, usually requiring no additional voltage conversion.

2. Socket Types

China's socket types are mainly Type A (two-pin flat) and Type C (two-pin round). Some areas may use other types (such as Type I three-pin sockets), but the following two types are most common:
- Type A Sockets:
- Characteristics: Two parallel flat pins, without a ground wire.
- Applicable Countries/Regions: Devices from the United States, Canada, Mexico, parts of Japan can be compatible, but voltage differences must be noted.
- Type C Sockets (European Standard):
- Characteristics: Two round pins, spacing about 4mm, commonly found in European countries (such as Germany, France, Spain).
- Compatibility: Supports most European-standard plugs.

Other possible socket types:
- Type I Sockets: Three-pin flat type (mainly seen in Australia, New Zealand), some Chinese hotels may be equipped with this type of socket, but the coverage rate is low.

3. Travel Adapter and Transformer Recommendations

• Adapter Selection:
• It is recommended to carry a universal international converter plug (supporting A/C/I types) to cover all possible situations.
• If only A/C type adapters are needed, corresponding models can be purchased separately (price around 20-50 RMB).
• Voltage Conversion:
• No transformer required: Modern electronic devices such as mobile phones, laptops, camera chargers typically support 100-240V wide voltage and can be used directly (device label needs to be confirmed).
• Transformer required: Hair dryers, curling irons, electric shavers that only support 110V require an additional transformer (power needs to match).

4. Practical Tips

• Hotel Facilities:
• Most mid-to-high-end hotels provide universal sockets or offer free adapter loans; it is recommended to confirm in advance.
• Purchase Channels:
• Domestic e-commerce platforms (such as Taobao, JD.com) or airport convenience stores can all purchase adapters at more affordable prices.
• Safety Reminder:
• Avoid connecting multiple high-power devices simultaneously to prevent overload.
• Check the voltage range on the device label (marked "Input: 100-240V" means no conversion is needed).

5. Common Questions and Answers

Q: Can my device with a US-standard two-pin flat plug (Type A) be used directly?
A: It can be inserted into China's Type A socket, but you need to confirm whether the device supports 220V voltage (if not supported, a transformer is required).

Q: Should I purchase a converter in advance domestically?
A: It is recommended to prepare in advance, as it may be difficult to buy temporarily in some remote areas.