Map of the Kingdom's Warfare.

Summary

Zhang Xuan expresses gratitude to Chai Shao for the Qing Stone Classic, which helps him navigate the Sui Dynasty, especially since Chai is Li Yuan's son-in-law. Chai Shao informs Zhang that the Yan Wang Mansion has all necessary medicines, leading Zhang to realize he wasted money buying medicine at the market. They visit the mansion's pharmacy, where Wang Yao Shi, the old Medicine Master, reveals that Zhang's prescription contains rare ingredients, costing around one hundred taels of gold. Wang suggests they consult Zhao Wudang, a knowledgeable royal merchant. Upon meeting Zhao, he explains the Purple Bug Jade Pupa is a rare insect pupa found only in the frozen grasslands of the extreme north, used by Turks for childbirth. Zhao mentions he will be going to the Turks soon, and Zhang considers joining him to obtain the necessary ingredient for his martial arts training.

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