Ключевые слова: access, accessibility, airport, automatic, barrier, business, card, check, china, city, design, disabled, door, enter, entrance, entry, exit, gate, gateway, hong, interior, kong, line, machine, metro, modern, open, pass, passage, passenger, people, public, rail, railway, row, security, smart, speed, station, subway, technology, ticket, train, transit, transport, transportation, travel, turnstile, underground, urban,