The first-line day is one of the scenic spots included in Wuyi Mountain pass. After we visited Tianyaofeng, we came to the first line of day. We heard that the right side was more fun, so we went to the right side. I carried my shoulder bag, which was wider at first, more than a metre, and then narrower and narrower as I walked up, I could only pass sideways. At one time, I thought I could not go. First, I discussed with the people behind me "I'll try it first, if we can't go, we have to go back together" and finally passed. I was so impressed. It's too narrow between the two mountains. Looking up along the black stone wall, we can only see a glimmer of light. There are also small black bats whose heads fall on the top of the cliff.