This is a map of Xi'an

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Xianese cities, with the exception of three, are all located in the mountainous border regions. These serve as key outposts since they all lay on the only trails that enter the country. In total there are seven trails that can be used to enter the country, and each has a city serving as a strategic point that makes sneak attacks impossible since any invaders would have to travel through at least one of the cities into the Xianese heartland. They also serve as facilitators of trade, providing respite to the brave tradesmen that travel through the mountains that divide Xi'an from the outside world.