Qingfeng Zui, a powerful poison that will kill you after smelling it once, actually has a name that sounds like a good old wine.
Since no living person has ever smelled it, how could it be said that it smells like wine and makes people shed tears when they smell it?
However, the person killed by it did have a smile on his face, but with tears in his eyes, just like when he was alive.
Conception: