What's in the chaotic cave on Tianxian Road in Zhejiang?

Chaos code. There are chaotic codes in the chaotic cave of Tianxian Road, and there are chaotic codes left by the chaotic ancestors. Covering the Sun is one of the representative works of Chen Dong, a famous online novelist. In the novel, Fan Yexian went to the chaotic cave in the wild forbidden area and found the chaotic code hidden inside, but he didn't say it.