最近很多大城市都投放了共享單車(shared bikes)，比如摩拜單車(Mobike)、Ofo共享單車等。由於它們方便停放，騎車也能起到鍛鍊身體的作用，作爲代步工具很受大家歡迎。但是，各地也出現了很多毀車現象，比如刮掉車上的.二維碼(QR code)、上私鎖等。
你對這種現象怎麼看?你對共享單車公司有什麼建議嗎?寫一篇符合邏輯的英語短文，80詞左右。
參考詞彙：bike-sharing companies 共享單車公司，Mobike 和Ofo 是兩家共享單車公司，convenience 方便，register登記
參考範文
The shared bikes like Mobike and Ofo bring great convenience to people. You needn’t lock them by simply using your smart phone. They can take you where the subway and bus don’t go. And they can be left anywhere in public for the next user.
However, bad things happen. Some people damage the QR code on the bike, or use their own lock, which causes trouble to other users.
In my opinion, it’s difficult to turn these people’s ideas in a short time. Therefore, bike-sharing companies like Mobike and Ofo need to do something. For example, those who damage the bike should pay for their actions. Also, because people use their real name to register as a user, it’s a good way to connect to one’s personal credit.
In the end, what I want to say is to take good care of public service
