Introduction to Yihong Pass: Yihong Pass is located on the west line of Tianmen Mountain. Looking across from Yihong Pass, there are three rolling peaks: Chisong Peak on the far left, because Chisongzi, the rainmaster of Emperor Shennong, was here. It got its name from the practice of seclusion; a nearby peak resembles the hat worn by a monk, so it is called "Monk's Brain"; in the middle is a huge stone cliff, which splits a bottomless canyon. Above the canyon, There is a natural stone strip that connects the two ends like a rainbow, so it is named "Duanshan Hongqiao", and "Yihongguan" is also named after this.