Machine, Person, Human, Bicycle, Bike, Vehicle, Transportation, Car, Automobile, Shoe, Clothing, Footwear, Apparel, Boat, Tricycle, Airplane, Aircraft, Carriage, asia, east asia, china, shaanxi, xian, city, economy, economic, market, transport, bicycle, road, street, marketplace, landmass, transportation, district, urban area, metropolis, urban center, economical, vehicle, wheeled vehicle, route, asian country