Very worthwhile. I thought a city wall was over fifty and a little expensive, but I went there on the last day. The city wall was very wide. We went to the city gate at 9:30, but it was not as far as everyone said. It was just too hot. My friends and I walked a quarter of the way from the South Gate to the East gate. It was not very tired. There were several horse faces between each city wall and some horse faces were repaired. Build a building, can rest on all sides, of course, we rest in the shade, the wind is strong, the temperature is appropriate, very comfortable, that is, approaching noon, walking when you feel the wall bricks burning, walking on it, there is really a lot of hot air surrounded you, need a lot of water, the situation allows it to climb up in the summer evening. There are no shops or places where water is sold. Water is twice the price below. Take it with you in advance. The scenery is beautiful and worth seeing.