The reason why flames need to be divided into two parts is because all ingredients have either Yin or Yang attributes. Yin ingredients naturally require Yin-type Flame for refinement, while Yang Flame is used to provide minimal supportive simulation. As for Yang Energy ingredients, they must utilize the raging energy of Yang Energy to refine their essence.
Initially, many ingredients require the use of Yang Flame, followed by Yin Flames, and finally Yang Flames again. Of course, there are exceptions. However, to successfully refine certain rare Spirit ingredients, one will need flames that possess both Yin and Yang attributes.
The earlier ashes have already dissipated, so when he attempted to separate the Yin Yang components, he reactivated his ancient enhancement technique Qi. Eventually, Qing Shui's left hand manifested Yang Flame, while his right hand showcased Yin Flame.
Practice makes perfect!
