Popular North Korean consumer products like Kalmaegi bicycles[8] are manufactured by prisoners using hand tools.
[11] Detailed analysis of satellite images shows a major expansion of the camp perimeter in 2010.
In the eastern part of the new perimeter, several new buildings were erected from 2011 to 2013, possibly to be used as prisoner housing.
[14][15] Lim Kook-jae, a South Korean abducted to North Korea in 1987 aboard the Dong Jin 27, died in Chongjin camp, according to a human rights organization.
Many pastors and presbyters, dissident Korean-Japanese, and people expelled from Pyongyang with their families are detained in Chongjin camp, according to the 9th International Conference on North Korean Human Rights and Refugees.