One night passed.
Although it's unclear what Chen An and that Hong Xue Shao discussed, his probing brought two pieces of news to Chen An, and that's enough.
One good news, one bad news.
The good news is that Tie Baiyuan indeed has a way to let people re-enter the Void Illusion Realm—
Back then, before Jie Kun officially forged the Demon Sword Wu Jian, he once consulted Tie Baiyuan and, under the latter's guidance, crafted a prototype sword as his graduation assessment piece.
That prototype also had the ability to open up an illusion indistinguishable from reality, named 'Langhuan', and it was recognized by Tie Baiyuan, but ultimately deemed a failure by Jie Kun, who shattered it and planned to melt it down.
Tie Baiyuan felt it was a pity, so he retrieved the Langhuan shards from Jie Kun, intending to keep them with him, warm them with the fire of the eight hundred Sword Casting Furnaces, and then condense the sword's Spiritual Qi to reforge and restore them.
