Emperor of the Nine Heavens.

Summary

In the story, alchemist Shi Zhi attempts to create the Xue Po Dan using purple charcoal but fails after thirteen tries. Yang Yu, observing her struggles, suggests she reduce the quantity of the main ingredient, Tian Shan Xue Lian. Following his advice, Shi Zhi successfully refines a fourth-grade elixir, surprising herself. She realizes that the Tian Shan Xue Lian's moisture content required a larger flame and less time for two ingredients compared to three. This revelation shifts her feelings from rivalry to admiration for Yang Yu, leaving her embarrassed for her earlier resentment.

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