Last week, the World Assemblers created the best combinations and the greatest rivals. For the fourth project, the 70 trainees, who have been assembled into 5 teams, will get to do a K-pop cover song mission. These 5 teams will each be divided into 2 sub-teams, Team White and Team Black, and have the Rival Match. This time, only 35 trainees, half of them, will survive and continue their journey.
