Large-scale criminal organizations from Eastern Europe, Africa and China are setting up shop - bringing people into Spain under the guise of giving them jobs, then keeping their passports and forcing them to work in nightmarish conditions, either in prostitution or labor exploitation…It has kept the…Central Unit Against Trafficking of Human Beings, very busy…The unit's biggest bust…[was] a Chinese forced labor case involving 80 alleged sweatshops…They…found some workers wearing next to nothing while they sewed clothes…[m]attresses leaned against walls, ready for the few hours workers were allowed to sleep before returning to work…In the worst cases, the workers ate, slept, worked, and sometimes used the bathroom - all in the same room.