Zhang Jian was quite intrigued.
Actually, to leave this world and travel beyond the void, one can do so after achieving Primordial Spirit.
But to ascend to the Celestial Palace, one must attain a Celestial Immortal Body.
Even if one becomes an Immortal, they still cannot ascend.
Of course, it is rumored that there are ways to force one's way in.
However, without the Ascension Talisman Decree granted by the Celestial Realm, one would not receive any special favor or status upon arrival.
The Celestial Realm is by no means a benevolent place. Like the Outer World, the number of divine beings, fierce beasts, and even powerful figures is even greater. If one is not strong enough and lacks a significant "golden thigh" above, they may face life-threatening dangers after ascending.
The ability to hold an Ascension Ceremony indicates that upon arrival, one will be recognized by the Emperor of the Celestial Palace.
