Asu Wuyue, famous for having a large crater of the duplex active volcano, is the most active is the Zhongyue Fire mouth. The so-called duplex volcano refers to the large fire mouth of several small fire mouths, as is the case in the Asu Zhongyue Fire mouth. Arriving at the west of Asu volcano, I was told that the main crater of Asu mountain was closed and the gas was over the standard. I thought it would be disappointing. I was told that the remote observation area was open an hour later. I was excited to buy a Shuttle Bus ticket (replace the original cable car) and followed the "cool MA Meng" up the mountain. I found that the closure was not an exaggeration when I arrived at the crater, and I fled back to the car in 5 minutes. Anyway, watching and listening to the breath of the earth up close is a cool experience!