Neidan (内丹) –
For Xiuyao Practitioners, when they achieve the equivalent stage of Jindan in their level of martial cultivation, the internal energies within their body will solidify and form a Neidan at their Dantian. The Neidan is referred to as Internal Elixir, and represents the essence and energies of a Xiuyao Practitioner’s cultivation. It can be used as nourishment to further another Xiuzhen Practitioner’s martial cultivation. When the Xiuyao Practitioner achieves the stage of Yuanying in their level of martial cultivation, the Neidan will transform into a Yuanying.