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Pei Yuan demonstrated the few high-level potions he knew to Li Pan several times on the spot, and Li Pan, afraid of missing anything, recorded them with a high-definition camera so she could watch and study repeatedly.
"The rest I don't know how to do; I've tried a few times but never succeeded. I'm not sure what the factor is, but I've recorded down the reasons for my failures. Look at my notes, and think over these on your own. After all, one person's thoughts might be biased; multiple people can bring different perspectives to understanding."
"Uncle, I'll study it."
"Good, then I'll head back first. I'm also taking the medicines with me since there have been quite a few people poisoned and injured recently."
After Pei Yuan left, Li Pan watched the videos of him making the high-level potions.