Sadly, due to frequent acts of vandalism or bad manners on the part of users, it’s quite common to come across bikes without seats, bells or faulty pedals and chains. In this case the only thing you can do is click the icon in the upper right that responds to the heading bao zhang 报障 (report a problem) and choose from one of the various issues from the list that you’ll find there.
At times you’ll also be asked to upload one or more photos of the damage so as to provide further verification and allow for quick maintenance on the part of the technicians. Consequently, after taking the picture, you have to click on the tijiao 提交 button (send) located at the bottom.