Ключевые слова: 3539 years, above 30, architect, architecture, beijing, building contractor, china, chinese ethnicity, city life, closeup, color image, construction, construction site, copy space, crane, day, development, expertise, glass, glasses, hardhat, head wear, horizontal, human body part, human face, mid adult men, occupation, one person, outdoors, photography, progress, protective workwear, reflection, safety,