There are many different definitions of \"cn\
1. cn: China's national top-level domain name
.cn, Internet domain name, national top-level domain name, indicates the national domain name of China. It is officially registered and operated by the China Internet Network Information Center (Inter NIC). .cn domain name is the only English international top-level domain managed by China in the world, and it is the Internet identity of Chinese enterprises, which reflects a cultural identity, its own value and positioning.
2, cn: Airport construction fee abbreviation: CN
The \"airport construction fee\" in the ticket is abbreviated as CN, and the \"fuel surcharge\" is abbreviated as YQ airport construction fee, which is a charging system set up to raise funds for airport construction. Airport construction in the early stage of civil aviation system and local channels.
To ensure local returns on investment, the system was retained. In April 2012, the Ministry of Finance issued the new Interim Measures for the Administration of the Collection and Use of the Civil Aviation Development Fund, which stipulates that the airport construction fee shall be replaced by the Civil Aviation Development Fund.
3. cn: Chinese abbreviation
The original meaning of Cn is: the abbreviation extracted from the English word china as the code of the Internet regional top-level domain. Now it is generally referred to as China, e.g. Us.
4. cn: TV channel (CartoonNetwork)
cn is owned by Turner Brocasting System, Inc. A cable television channel dedicated to animated programming, which was later merged with TBS into Time Warner.
5, cn: domestic unified serial number identification mark
\"CN\" is the identification symbol of the national unified serial number. The unified domestic issue number is identified by the China country code \"CN\" stipulated in GB2659-86, which is composed of two parts: the newspaper registration number and the classification number, separated by a slash \"\/\".