Blue Sky Concave is the commanding height of Huihang Ancient Road, at an altitude of 1050 meters. Because the two peaks are in the "concave" type, the blue sky and white clouds are embedded in them, so it is named. This is the most open place of Huihang Ancient Road, and it is also a favorite camping place for hiking travel friends. In the spring and autumn seasons of flowers, red mountains, yellow rape flowers, and some unnamed wild flowers, dotted in the green valley, beautiful. From Jixi, it takes4.5 hours to get to the blue sky concave. When the inn is full of smoke, many travel friends have settled down and started to eat. Regarding accommodation, there are two ways to stay in the blue sky concave. One is to live in the inn. There are three inns in Lantiancao. They come down from the direction of the pig pond. They are Lantiancao Inn, Gudaoyu Station and Huihang Home. There is no air conditioning and no hot water. If you want to have good conditions, go to Xietang. Lantiancao Inn has cabins, which is relatively good; Huihang family is a cabin with colored steel shed, which is located in the blue sky concave valley, suitable for camping. The second is camping, you can bring your own tent, or rent a tent at three inns (about 100 yuan, including meals, but it is best to bring your own sleeping bag, not very clean). The campground is very open, but the ground is very wet, and it is not comfortable to sleep. However, the moon in the sky, the sound of thunder, and the small ditch on the side of the mountain, the water, sleep is very artistic. Regarding eating, there are not many types of meals in the mountains, but after a day of mountain road, even braised pork, green vegetables, fried beans with chili, and four kinds of side dishes are also delicious. Regarding the location of the blue sky concave, it takes about4-5 hours to walk up the mountain from Jixi, and about 90 minutes to Yonglai Village from the blue sky concave. Regarding entertainment activities, don't worry about boredom. There are many travel friends on the top of the mountain every time you go. In the evening, there will be three or five groups of people gathered around the bonfire party. Once, there will be a travel friend who also brought a big stereo, which rang from the bottom of the valley. The atmosphere of playing is very high. Donkey friends are not very familiar with each other, join them, they are very enthusiastic! ! Regarding watching the sunrise/sunset, 10 minutes walk from the bottom of the blue sky valley to the pig pond, the mountain view here is a wide view, is the ideal place to watch the sunrise. However, if you climb from the mountain top to the left and follow the small mountain road for more than 10 minutes, to the top of the mountain, the view is better.