...Yeah, he would like a hug. Hugs are, in fact, comforting, and especially so when they're from people who repeatedly put credible efforts into keeping him alive. 

"I see?" he tries to ask in Mandarin, again he has no idea of the appropriate grammar here but 'see' is one of the ten or so words he actually has mostly-memorized. He switches back to English, though. "- sorry how do you say 'book'?" 

"Book," he enunciates.

"I see book." Pause, then in English, "was that a question? How do I make it a question in Mandarin?" 

Lan Wangji provides the translation.

Masozi repeats it very carefully. He grins about it again. And then writes down his approximation of it phonetically in his notebook, because he expects that to be a sentence he might use rather a lot. 

Jiang Cheng hands it over. "Be careful with it! We went through half the library to find it for you."

"It's logic puzzles." And Wei Wuxian explains the concept of a grid logic puzzle.

This is the BEST! 

Masozi gives the book several compliments on being the BEST MATH BOOK, and then stares very intently at one of the puzzles and starts working on solving it. This kind doesn't involve much of the math notation or concepts he's unfamiliar with, and it clicks for him very fast. 

"We got you some food, too, we figured you wouldn't want to go to the cafeteria with"-- he gestures.

Masozi isn't sure what he's gesturing at, and he's confused? 

"I can go to the cafeteria? I'm not hurt." 

"Everyone's going to be staring at you and whispering and if you can't think of yourself think of poor Jiang Cheng."

"They shouldn't! None of this is your fault!"

"Or rather poor Lan Xichen when he stomps up to Beijing and asks them if they'd like to have a conversation with Zidian."

That...doesn't seem like an obvious reason to not go to the cafeteria? It's not like he would even notice, if he's not staring back, which - why would he? 

"- Does it bother you if people stare at me?" he asks Jiang Cheng, confusedly. 

"Yes! Because they're cunts!"

"...I'm not sure I think they did something wrong? I - they were scared of me, because I - didn't know what to be careful of, here, and I - made it look like I was the sort of person who'd hurt people even though I'm not? But I don't think it was bad of them to be scared and to - try to keep their people safe...?" 

"Well, you aren't going to hurt them! The only person who might have died here is you!"

"But they didn't just kill me! They were - being careful - trying to figure out what was true - they asked a dozen people what they'd seen me do! And I - think it makes sense? I didn't know what the rules were or that New York was important, so I was rude to them, and someone being rude to them is scary because it - means they also might break the other rules too -" 

"Well, I won't threaten New York, but most of the Anglos didn't do shit. They're just vultures."

Shrug. "I - please don't threaten anyone because of me? ...I guess maybe we should eat here then and not the cafeteria." 

She pats Masozi's hand. "a-Cheng can avoid it if you ask him nicely but we should really avoid the temptation."

"People shouldn't call you a maleficer like they wouldn't have pulled malia from a rat in your shoes!"

"But...it matters, right? That I - was in that situation, and they weren't. Because it's - it gives you brain damage, and it's supposed to be addictive and, and make it so you can't use normal mana, and it's - I don't know why it didn't do that for me! I'm not even a little bit tempted to do more of it and I think I can get mana and use it fine. But it's - not stupid of them, that they'd be scared I would be addicted and that it'd be hard to stop?" 

"No, actually, it is stupid of them and you should be pissed off when people are trying to kill you for no reason!"

"a-Cheng, Masozi, let's talk about something nicer. You could show him your other math book."