自行车 (zìxíngchē) means "bicycle." It literally combines 自行 (self-moving) and 车 (vehicle). It is the standard term used across mainland China for a bicycle, appearing in everyday conversation as well as in discussions of transportation and exercise.
我每天骑自行车上班,大概要二十分钟。
Wǒ měitiān qí zìxíngchē shàngbān, dàgài yào èrshí fēnzhōng.
I ride my bicycle to work every day; it takes about twenty minutes.
这条路上有专门的自行车道。
Zhè tiáo lù shàng yǒu zhuānmén de zìxíngchē dào.
There is a dedicated bicycle lane on this road.
她在网上买了一辆新的自行车。
Tā zài wǎng shàng mǎi le yī liàng xīn de zìxíngchē.
She bought a new bicycle online.