Nowhere(无处, adv) are bikes more widely used than in China. About 300 million bikes are being used daily around the country, mainly for transport purposes. Indeed, I would certainly cycle to work if I lived nearer to my workplace.
Riding a bike contributes to our health. At the very least, cycling burns calories. In fact, it does much more. Cycling helps to train our hand-eye-feet coordination and sharpens our sense of balance. It is easy to learn and not physically demanding. It is probably the best sport for overweight people. Besides, the air will be a lot cleaner if more people choose to use bikes instead of cars. Bicycle is the most environment-friendly means of transport except for walking, which has the intolerable(无法忍受的， adj) downside（底侧的，adj） of being too slow. Actually, due to traffic congestion(堵塞，n), cycling is often the quickest way to reach your destination. Apart from being clean and quick, cycling is safe. This means safety for ourselves and others. In light of the actual speed at which a bike usually travels, the likelihood of a collision with pedestrians and fellow cyclists is minimal. Even in the event of such an accident, people involved usually get away with a few scratches at the worst.
Having said that, a more critical rider may find a bike less than satisfactory. For example, it can’t shield against rain or dust; the saddle（鞍，n） is often uncomfortable. Besides, bikes are unfit for long distance travel. After all, most people can't ride more than 20 miles at a stretch.
Taken all together, the bicycle is indeed a brilliant human invention. Unlike many other devices, bike reinforces（加强，vt） our reliance on ourselves both physically and mentally. This never fails to fascinate（使着迷，vt） me.
