Domain Name Registration

.com  
Businesses prefer ".com" for its widely recognized business presence on the Internet.

.net  
For internet service providers and businesses directly involved in the infrastructure of the Internet.

.org
For non-commercial sites or non-profit organizations.

.biz  
For business websites. .Biz offers an opportunity for businesses when their ".com" extension is already taken.

.info  
For resource-based websites designed to reach a customer base with info about your business.

.com.hk 
For commercial entities which are either registered with the Registry of Companies and Businesses.

.net.hk  
For network providers in Hong Kong. Registrants must possess a valid license issued by the government.

.org.hk
For non-profit, registrants must be registered with the Registry of Societies.

.edu.hk  
For educational, for tertiary institutions and schools.

.idv.hk  
For Hong Kong ID cardholders aged 11 or above (e.g. myname.idv.hk)

.hk 
Both local and foreign individuals/organizations can register domain name in this category. 

.cn
Local or individuals or entities. Commercial entities registered which required to provide supporting documents including Business licenses and Identity Card Copy.