From the bar chart given above, we can observe that the number of people traveling abroad experienced some changes in China during the past several years. From 1999 to 2000, the number of Chinese people traveling abroad increased rapidly from 7.5 million to 10 million, and then to 12.1 million in 2001.
The bar chart reveals that people in mounting numbers are going to travel abroad. What exactly contribute to this phenomenon? Reasons can be listed as follows: for one thing, the authorities have issued some preferential policies to promote the development of the overseas tourism industry, which encourages a sudden emergence of travel agencies that can provide customers with convenient overseas tourism services. Additionally, with the improvement of financial status and purchasing power, a considerable number of Chinese people can afford the once-deemed-expensive traveling expenses. Last but not least, as there exists huge difference in cultures, customs and landscapes between China and overseas countries, quite a few people hold that overseas traveling is not only a perfect way to relax oneself, but also a good chance to enrich their knowledge and expand their horizons.
By observing the trend in the past, we may forecast that the growth tendency will continue. However，overseas tourism is also a highly variable industry which is vulnerable to seasons and climates， international political situation，fluctuations in exchange. (226 words)