Today, as a greener means of transportation, bike-sharing is becoming more and more popular in many cities. There are a lot of advantages and a lot of problems. If we ride a shared-bike, we can take exercises and reduce the traffic pressure. It is not only very convenient but also has less pollution. But bike-sharing are not as good as we used to think. Sometimes we find that some shared-bikes have been damaged. Also, there are less bikes than usual. Maybe because it has been thrown away or been stolen by someone. Finally, a lot of people realized that we should take care of shared-bikes. We must civilized use them, follow the rules to protect them. Let’s take good care of shared-bikes, our life will be better.