"Haha, well, let's not bother with formalities. Yang Chen, you can ask me anything you don't understand, and I'll tell you everything." Hua Wu Great Emperor said.
Yang Chen nodded and asked without hesitation, "I have some understanding of the Door to Dao Verification, but what is this cleaning of the Dao Door all about?"
"Let me put it this way, the Door to Dao Verification opens once every hundred to two hundred years. No one can calculate the exact interval. However, the Royal Family and our Four Sects, together with the Tu Wolf Clan and the Fire Essence Beast Clan, all possess mysterious techniques that can roughly calculate the opening time of the Dao Verification Door. Just like when Emperor Ren Hu came earlier, he had already explained this matter." Hua Wu Great Emperor said.
Yang Chen nodded; he already knew a little about this.