activity at beware blank blue build building caution construction council danger dig digging hazard industrial industry information man manual men metal repair repairing road roadworks rope safety sign site street symbol triangle urban wall warning white wood work worker works action appearance at work business cage city clean cleaner cleaning cleanliness elevating exterior glass height helper high hoisting platform house inhabited job lift maintenance office outdoors reflection service support tidy tidy up tool wash washer window wipe wiper working. commercial angle apartment architecture Architecture And Buildings arranging Asia backgrounds Building Activity building exterior Built Structure center china Chinese Culture design District Type Downtown District fame Famous Place finance flower bed Formal Garden global communications grass green headquarter Hong Kong International Landmark non-urban scene Ornamental Garden park pattern real estate Residential District sky skyscraper tall textured Textured Effect tree turf urban scene View Into Land