It is just 7:00 in the morning and already there are the early birds at the subway and bus stations. Not wanting to be caught up in the rush hour, they rise early so as to be ahead of the mad crowds who will soon appear from all directions.Quietly they get into the subway train and the buses and lean back to catch up on their sleep.

　　With the hands of the clock pointing at 7: 20, the exciting scene happens. Out of nowhere there are thousands of vehicles on the road, cars, motor'cycles, taxis, buses andbikes fly their way through streets and lanes, horning at each other and cursing the traffic lights. There are also people, smartly dressed office ladies and gentlemen,

　　uniformed workers,nurses, teachers and students, rushing about, now and then anxiously glancing at their watches and blaming everybody that blocks the way. School children seem never to walk but run everywhere like a swarm of bees. To the rush mass nothing is more important than getting in time to their destinations.

　　This is the metropolitan rush hour. But about an hour later, the roads are free of heavy traffic,people are seen walking slowly, vacant seats on the buses are waiting for passengers.The mad rush for the day is over, but it will be repeated at the same time,the next day