Cheng Fei Jun was only at the seventh layer of the Gushing Spring Tier. Normally, he would at most be able to refine a medium level Black Grade medicinal pill, but since he could actually become a high level Black Grade alchemist, it meant that he definitely fused with a wisp of Strange Fire, achieving the breakthrough.
Although Ling Han had a ball of Strange Fire, he wouldn't mind letting this wisp of Strange Fire make it even more powerful.
Cheng Fei Jun's gaze was gloomy, and his expression revealed that he was moved.
Ling Han guessed that he possessed the Strange Fire, so Cheng Fei Jun could do it as well since Ling Han's cultivation was even lower—only at the first layer of the Gushing Spring Tier.