To break through from the Human Level to the Earth Barrier, or to advance from the Divine Consciousness Realm to the Golden Core Realm, one needs a Golden Core as the foundation of their cultivation.
The way to cultivate a Golden Core is to first combine technique-matching elixir resources with cultivation techniques, and refine an External Elixir full of spirituality. The cultivator then takes the External Elixir, which is broken down by the Spiritual Fire in their Qi Sea inside their body, allowing the medicinal power to disperse within their Dantian. This power helps them to condense an inner core.
Chen Su set up her furnace, preparing to refine an External Elixir for Chu Liang.
Her pill furnace was not large, with a body painted in red and green patterns and decorated with florals and birds. It emitted no heat, but exuded an air of elegance that was clearly very feminine.