Ключевые слова: 30s, architect, asian, chinese, construction, construction site, contract employee, copy space, crime prevention, day labor, day shift, disaster prevention, field work, fulltime employee, gig worker, gloves, greeting, guard, helmet, japanese, korean, male, man, middle age, on site work, outdoors, parttime job, recruitment, safety first, safety management, safety measures, safety vest, security, security guard, security uniform, smile, staff, standing, standing up, surveillance, taiwanese, temporary employee, text space, traffic control, uniform, vigilance, work, worker,