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ers to the northwest of the Bell Tower. It was built in 1380. There used to be a huge drum in the tower, which told the time at dark, and that is how the tower got its present name. Besides marking the time, the drum was also used to give warnings to people in times of war. The base of The Drum Tower is 1,924 square meters in size, and 34 meters in height. It was built with blue bricks. The Drum Tower has a rectangular shape and shows tier and the outside eaves are decorated with networks of wood arches. At last, we will visit the famous city wall of Xi’an. The most plete and the best preserved city wall in china. The city wall of Xi’an is an extension of the prior Tang dynasty structure. It was stared in 1370 and finished in 1378 and has a rectangular –shaped construction. It is over 4 kilometers from the east to west and about 3 kilometers from the north to south. And the total length is kilometers. It stands 12 meters high, 1214 meters wide across the top and 1518 meters thick at