The opening time of the Upper Pure Secret Realm is not fixed, but it can be confirmed that the interval between openings will be very long.
And to enter the Upper Pure Secret Realm, there is only one way, which is to hunt Flame Demons and accumulate corresponding points.
A thousand years before the opening of the Upper Pure Secret Realm, the Domain Master of the Divine Domain will announce the news to the entire Divine Domain. Martial Artists who want to compete for the qualification to enter can register with the official authorities in the city where the Domain Master is located.
After registering the information, one can go to the Flame Demon Space to hunt Flame Demons and earn points. In the end, the top fifty Martial Artists in terms of points will have the qualification to enter the Upper Pure Secret Realm.