N. Korea has up to 400,000 slave workers

The 81-page report, titled “Sweatshop, North Korea,” was based on testimony from 18 North Korean defectors in South Korea, including four former workers for the construction projects.An estimated number of 200,000 to 400,000 construction workers toil more than eight hours a day under extreme conditions for 10 years although they receive hardly any wages.

Many of them, both men and women, are physically weak and came from lower-class families. They were forcibly taken to toil when they were in their senior years at middle school.