Past / Many years ago, In the past , Many years ago , When she was a child , In the old days, A mountain porter , A boat on the Yangtze River , Transport used to be very slow , Travel was difficult , Climb mountains to get from place to place , Use boats to move around , Made long journeys by land or sea , Seldom travelled by air , Write letters by hand , Used to ride a train , No computers back in those days, Today / Nowadays, Today , Nowadays , Life today, An international city , A modern city , A tunnel , Dongshuimen Yangtze River Bridge , Ships and planes transport goods , Trucks take goods to stores and homes , More than 14,000 bridges [音频内容], Bus stops and underground stations , Highways and bridges are everywhere , Tourists from all over the world , Tons of songs on smartphone , Send emails.

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