One of the main alchemical materials of the "Boundary Pearl" comes from the Dreamworld Stone that Chen Fei had long left unused.
This extremely rare alchemical material inherently comes with four-dimensional rules, perfectly unifying time and space, making it very suitable for refining a Life Space that can accommodate living beings.
The precious alchemical artifact "Secluded Space Tower," exchanged from the Blue Star Sovereignty for his family, specifically for emergencies, only used a sesame seed-sized Dreamworld Stone. Although the Life Space refined was not particularly large, it was already a top-spec Refuge.
Such Refuge-type alchemical artifacts, regardless of size, are not something ordinary people can touch, let alone have the opportunity to know about.
