Jiu Feng insisted on constructing an altar in her new cave dwelling, to open a channel between the two realms and connect with the Demonic Realm. Demon God Bai Ze tried to persuade her a few times to no avail, and eventually just let her be. Thereupon, with great mana, she summoned the Mountain God and gathered various materials, drew up the Formation, and constructed the foundation. In less than half a year, the altar capable of opening the channel between the two realms was rebuilt.
Of course, this was also because the third Infinite Cataclysm was approaching, and the Demonic Realm was already drawing closer to the Three Realms under the scheming of Demon Ancestor Lou Hu, intending to return to the Three Realms. Otherwise, even with the altar, it would have been impossible to open the channel to the Demonic Realm.