C493 Understand the Secret!

Lau Yiheng racked his brains for ten hours, but he still couldn't figure out anything. In the end, Lau Yiheng walked out of the Nine Heavens Exquisite Pagoda helplessly and said loudly, "Hong Kun, come out."

With a flash of white light, Hong Kun appeared in front of Lau Yiheng and said