CJJ is the IAIW (International Air Transport Association Airport Code) for Cheongju International Airport.
Cheongju International Airport is located at Ipsang-ri, Naesu-eup, Cheongwon-gun (county), Chungcheongbuk-do; it is located just north of Cheongju. A railway station is located in the vicinity. It opened as a military airbase in September 1978, and in 1984, international airport construction began. The construction was completed on December 1996, and it was opened with the name of Cheongju International Airport on April 28, 1997. It can hold 1,230 thousand persons in domestic line and 1,150 thousand persons in international line on annual basis, and also the parking lots can hold 770 vehicles. In addition, airplanes can operate 196,000 times a year. There used to be flights to Japan and Saipan, but they were stopped due to low ridership. Currently, there are domestic flights to Jeju and limited international flights to China and Taiwan.
The reason I chose this as my username was to commemorate the hard work and dedication that went into the building of the airport and the improvements in the social and monetary system that came with it. It changed the lives of many in the area and brought employment to many.
Reposted from another similar thread.