Beneath the Sun God Wood.
While Jiang Ding practiced cultivation, he simultaneously used a large amount of Sun Flame Crystals and the high temperature generated by concentrated sunlight to melt the #10 Synthetic Geng Metal. Using the liquid form of the #10 Synthetic Geng Metal and a large amount of purified uranium as ink, he painstakingly outlined the second Heavenly Gang Ban within the Taiqing Flying Sword.
After nearly ten years of refining,
the second Heavenly Gang Ban was still indistinct and hazy, exhibiting only minuscule substantial changes that could only be discerned with Divine Sense.
This is the difficulty of refining a Nascent Soul's treasure.
Typically, even if a Nascent Soul Monk possesses exceptional talent, creativity, and ample resources, it often requires over a thousand years to complete the eighteen inherently spiritual Heavenly Gang Bans and elevate their Life Treasure to the pinnacle of a Nascent Treasure.