Octagon City, is a famous attraction on the Xiahe Ganga grassland, about 50 minutes drive north from the Xiahe River, this city has a long history, the city wall is well preserved, the city is a village, vibrant. There is an observation deck at the back of the city. It is recommended to climb up and taste it carefully, overlooking the whole view of Octagon City and enjoying the magical scenery of Ganjia secret.