Reversed Sun Dan is a fourth-grade elixir that is not even held within the royal family, but only exists in the Pill King Hall.
Qin Wuque went to great lengths to connect with an elder from the Pill King Hall through the Wanbao Trading Company. After begging bitterly, the elder agreed to help and gave him a list of medicinal materials needed to refine the Reversed Sun Dan, which he then gathered.
He practically exhausted all his assets to put together the medicinal materials from the list, with only the final ingredient, Phoenix Spirit Flower, remaining.
As Qin Wudi was born to Concubine Xiao and is the royal family's number one genius, he caught the eye of the Emperor. If the Empress were to be deposed and replaced by Concubine Xiao, Qin Wuque's position as Crown Prince would be irretrievably lost.
