Can be used in the domain name: 26 English letters: A - Z (not case sensitive), ten numbers 0-9 and "-" (the hyphen in English).

Since domain names at all levels on the Internet are managed by different organizations, the ways in which each organization manages domain names and the rules for naming domain names are also different. However, there are also some different rules for naming domain names. The characters can only be A-z, 0-9, and "-".

Character combination rules in domain names: In domain names, English letters are not case-sensitive, and there are certain restrictions on the length of a domain name. "-" cannot be used as the beginning and end, and the domain name can be up to 67 bytes (including suffixes .com, .net, .org, etc.)

Extended information:

Related Regulations:

1. Registration of domain names containing words such as "CHINA", "CHINESE", "CN", and "NATIONAL" must be formally approved by relevant national departments (referring to units at the ministerial level or above).

2. The names of other countries or regions, foreign place names, and names of international organizations that are known to the public are not allowed to be used.

3. The full name or abbreviation of the name of an administrative division at or above the county level (including the county level) must be formally approved by the relevant people's government at or above the county level (including the county level) when registering.

4. Industry names or common names of products shall not be used.

5. Business names or trademark names that have been registered by others in China are not allowed to be used.

6. Names that are harmful to the interests of the country, society or the public must not be used.

Baidu Encyclopedia-Domain Name Registration

Baidu Encyclopedia-International Domain Name