Regarding Shi Touyu's confusion, Yu Liumei explained it like this.
"I've said it before, you can see a person's character by how they treat someone they're dining with. Why did I notice her? Just when I was halfway through my meal and went to the restroom, I overheard her standing by the toilet talking on the phone saying thin girls look better. But when I came out of the restroom, I saw this scheming girl kept putting pig intestines on the plate of the woman next to her! She says thin looks good but gives fattening food to others, clearly someone full of schemes. Also, when I passed their table, I noticed there were only three prawns left on their plate; she pretended to be enthusiastic and gave the smaller ones to others, acting all generous, but kept the biggest one for herself! That's why she is the worst!"
In the eyes of a foodie, these things happen within seconds, but it's enough to judge someone's character.
