<p> In the past, traveling by air is hard to imagine for most Chinese. Nowadays, with the development of economy and the improvement of living standards, increasingly more Chinese, many peasants and migrant workers included, can travel by plane. They can reach all of the big cities in China by air and many other cities are also preparing to build airports. Aviation services are improving steadily and cheap flight tickets are available frequently. In recent years, the number of people who choose to travel by air during holidays has increased steadily.</p>
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