Chinese phone numbers are a system of telephone numbering that is unique to the People's Republic of China. The country has an extensive and complex telephone system, and it is not compatible with the international system of telephone numbering. As a result, Chinese phone numbers are composed of two parts: the area code (one or two digits) and the subscriber number (usually three digits).

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The first digit in a Chinese phone number indicates which region of China the number is for. The second digit indicates which province or autonomous region the number is for. For example, the local dialing code for Beijing is 010, but the local dialing code for Shanghai is 06.

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Most Chinese phones have at least three buttons: one to make a call, one to answer an incoming call, and one to hang up. However, some older models only have two buttons: one to answer an incoming call and one to hang up.

It is important to have a Chinese phone number because it allows you to communicate with people in China easily. 

If you don't have a Chinese phone number, you will likely have to use an intermediary service such as Skype or Google Hangouts to make calls to China. 

This can be problematic because these services are not always reliable and sometimes require additional fees. By having a Chinese phone number, you'll be able to call anyone in China without any difficulty. 

Additionally, having a Chinese phone number will allow you to access certain Chinese websites and apps that are not available to non-Chinese users. For example, many Chinese businesses offer exclusive content and services only to those who have a Chinese phone number.