Cheng Yipu would bring a candy every time he saw Lin Dian, and the taste would not be the same after a month.
Over time, Lin Dian formed an equation in his mind: Cheng Yipu has sugar, and sugar is sweet, so Cheng Yipu is sweet.
One day, Lin Dian rummaged through his pockets but couldn't find a single candy, and he suddenly withered.
Cheng Yipu slowly approached her and said in a dumb voice: "Do you really think I am a candy seller?"