Introduction to Yixiantian: Yixiantian is located on the west side of the main peak of Duofu Mountain, about 10 meters away from the top of the mountain. It consists of a huge boulder and a cliff, with a cliff on the left. Because there is a gap above the passage, you can see the blue sky like a line, so it was named "One Line of Sky". Whenever the setting sun shines, the passage is splendid and golden, like a fairyland.