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　　i"m studying in a city famous for its walls. all visitors to my city are amazed by the imposing sight of the city walls, silhouetted by the setting sun with gold and shining lines. with old, cracked bricks patched with lichen, the walls are weather-beaten guards, standing still for centuries in protecting the city.

　　our ancestors liked to build walls. they built walls in beijing, xi"an, nanjing and many other cities, and they built the great wall, which snakes through half of our country. they built walls to ward off enemies and evil spirits. this tradition has been maintained to this day as we still have many parks and schools walled off from the public. i grew up at the foot of the city walls, and i"ve loved them since my childhood. for a long time, walls were one of the most natural things in the world. 　　my perception, however, changed after a hiking trip to the eastern suburbs, a scenic area of my city. my classmates and i were walking with some international students. as we walked out of the city, we found ourselves flanked by taller and taller trees, which formed a huge canopy above our heads. suddenly an international student asked me, “where is the entrance to the eastern suburbs?” 　　“we"re already in the eastern suburbs,” i replied. 　　he seemed taken aback, “i thought you chinese have walls for everything.” his remark set off a heated debate. at one point, he likened our walled cities to “jails,” while i insisted that the eastern suburbs were one of the many places in china that had no walls. 　　that debate had no winners, but i did learn a lot from this international student. for instance, he told me that universities like oxford and cambridge were not surrounded by walls; the campuses were just part of the cities. i have to admit that we do have many walls in china, and as we are developing our country, we must carefully examine them, whether they are physical or intangible. we will keep some walls but tear down those that impede china"s development. 　　let me give you an example. 　　a year ago, when i was working on a term paper, i needed a book on business law and found a copy in the law school library. however, the librarian turned down my request with a cold shoulder, saying, “you can"t borrow this book, you are not a student here.” in the end, i had to spend 200 yuan buying a copy; meanwhile, the copy in law school was gathering dust on the shelf.

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