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Bike-sharing is a good choice for short journeys. It allows people to borrow a bike from one place and return it at another place easily. With a large number of people choosing bike-riding instead of driving, especially in some big cities, bike-sharing has been popular all over China. In December 2016, Shanghai became the world’s largest bike-sharing city according to a survey done by Centre for Urban Development.

It’s very convenient to use shared bikes if you have a smart phone. First, you should download such an APP. Then you can find a nearest bike through the APP and scan the QR code. Then the bike can be unlocked (解锁) itself. After riding, you can lock it and pay the fee.

Bike-sharing is a green way of transportation and provides a user-friendly experience. An engineer of a company says that since the start of shared bikes, people have made fewer trips by car. “The love for shared bikes is not only among young people but also among people over sixty. I can easily find one and never worry about where to park it,” said Chen Hong, who is an office worker in Beijing. So it is very convenient and helps people save a lot of time when they are in a hurry.

However, bike-sharing also brings many different kinds of problems. Some people don’t park the bikes in the bike parking lots, which makes it difficult for people to walk. And some may even try to steal or damage (损害) the bikes. What’s more, even some children under 12 can unlock and ride the bicycle. There is no doubt that it’s very dangerous.

Technology and science have changed our lifestyles. We have to say bike-sharing brings us a lot of convenience, and we also hope that people can not only enjoy it but also put it to good use.

1．Which city was the world’s largest bike-sharing city in 2016?
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2．Who loves shared bikes according to Chen Hong?
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3．Why does shared bikes sometimes make people’s walk difficult?
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4．What do you think of bike sharing? Why do you think so? (Give at least two reasons.)
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