North Korean teens and twenty-somethings with no prior construction experience have nearly completed a new 80-story skyscraper in Pyongyang in under seven months, according to state media on Monday, as part of a project to give youth “hardship” experiences.

The Rodong Sinmun reported that young workers built a new floor every 14 hours to “complete the 80-story residential building framework construction” before the Oct. 10 Workers’ Party foundation holiday.