hoang van tuy from vietnam used to work at a metal processing factory in his home country. >> surroundedy the foreign staff is a single south korean. he's the only floor worker to have been here since the company's founding. yeon myeong-cheon has worked as a parts cutting expert for 30 years. >>> nine hours after han's workday began, he is finally finished for the day. he's monotonously cleaned around 1,500 of the same parts. >> at 6:00 p.m. korean factory workers gather at the day laborer employment agency to receive their daily wages. they get an average of $36 for eight hours of basic labor. compared with these korean day workers, foreign laborers get better treatment because they are guaranteed insurance and often benefit from free meals. after everyone has collected their wages, a man in his 30s continues to wait in the office. on this night he waited for two hours with no success. heong's workday ends at 8:00 p.m. after doing two hours of overtime. he works overtime almost every day to earn extra money. the firm also provides him with a free dinner if he works late. he has already