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Bicycle are a few problems to use it. For example, it needs a special space to store it, the pedal would crash the user’s leg while pushing it forwards, and there is no space for placing drink. The “Rotation” is a locally improved bicycle, whose handlebar can be rotated to 90 degree to store. This can save space and make the bicycle be stored orderly. The pedal can be turned upward to avoid scratching the leg. And the green rotatable ring can be used to place bottle stably. These improvements could avoid the current problems of the bicycle efficiently, making it more comfortable for use.