Jiayuguan is known as the world's first Xiongguan. It is the only way to the Silk Road. It is also an ancient military heavy ground. It is connected to the Canary Great Wall of Heishan in the north and the first pier in the south. It is about 9 years earlier than Shanhaiguan. Half of the desert, half of the blue sky, magnificent and magnificent, the wind is raging, and the winter is more harsh.