The Crane's Red Crown

When it came to the poisons of this world, Yan Zheyun didn't know what to think. The memorable experience that he'd suffered at the hands of aphrodisiacs in the past was a warning that he shouldn't rely strictly on his knowledge from his previous life as not everything operated by the rules of the universe that he was familiar with. 

That being said, there were aspects that he could rely on, such as the way addiction worked, that were indicative of certain similarities that were as good a starting point as any. 

"Have you ever heard of He Ding Hong?" he asked casually as he waited for Yun En to prepare the silver needles used by the eunuchs to test the food that their masters were about to consume.