The written parts are like two-dimensional anchors for the full design which is only visible to cultivators.  It's not just what's in ink, which is why they don't mass-print them with woodcuts.  The base components have meanings but can manipulate one another in a way that's very unlike words in a sentence.  That makes larger talismans hard to predict; talismans are often split into smaller sections that trigger one another to get around that. 

Wei Wuxian clearly thinks of it like a fun puzzle to solve, as well as something where one ought to take advantage of serendipitous results - half of his favorite talismans came about when he was trying for something else and got sidetracked by a novel effect.  Most people only ever use memorized talismans, or swap out full subsections.

Wei Wuxian gets interrupted by a yawn.  He pouts as dramatically as he can while being at such low energy.  "Ah, I want to talk more about talisman design.  You'll definitely have to ask me again when I'm healed up and have paper and ink in front of me."

"Yes, I certainly will!" Weeping Cherry agrees. "The whole subject is fascinating."

She really wants to figure out how to see and manipulate spiritual energy. Wei Wuxian has shared just enough hints for her to start making guesses about the structure of talismans, but of course that isn't anywhere near enough to actually put the knowledge to use.

Her sleep cycle isn't synced up with local time yet, but, conveniently, she's starting to feel sleepy herself. She checks the position of the sun and the amount of processor power her forb has rebuilt. And ... yes, she can just about get a full 10 (simulated) hours of sleep before local sunrise, and sync her body clock.

"Thank you very much for answering my questions. I've had fun learning about your world. I hope you rest well," she says.

Jiang Cheng swoops in and makes sure Wei Wuxian eats something first, but Wei Wuxian is absolutely asleep very quickly after that.

Everyone else meditates, then sleeps.  Someone is always set to keep watch.  At sunrise this is Jiang Cheng, who doesn't need extra spiritual energy for flying or healing and therefore doesn't need to spend as much time meditating as the others. 

Ah, interesting. She had assumed that they probably would not get up much before sunrise, and that appears to have been right. She stretches in her little virtual space, casting off the blankets of the night and summoning a breakfast smoothie.

During the night, she got back enough control that she can manage somewhat decent directional audio. She speaks softly, to avoid disturbing the sleepers.

"Good morning, young master Jiang."

"Good morning, Weeping Cherry." 

Jiang Cheng shifts, trying to sit up properly now that there's someone else awake without making it obvious that he'd been sitting in anything but the most proper and dignified posture to begin with. 

Weeping Cherry doesn't really have posture right now, and making her smoothie-slurping sounds audible is probably not a good way to reinforce the idea that she's an actual person who is here with him, instead of just a sword.

... actually, cultivators might actually be able to hear her heartbeat and breathing noises. She includes them in her audio feed because people find talking to someone who doesn't have them subliminally creepy, but if cultivators have better senses it might be more obvious.

"I hope you slept well?" she offers instead. "Also, I'm curious: can you hear my heartbeat?"

"Well enough.  You?"

"And I can't, not from here."  If she wants him to go over to check, he'll have to wake someone else up.  'Don't let artifacts talk you into touching them when no one else is around to spot you' is one of those rules that cultivation disciples get drilled into them pretty hard.  "Do you have a heart?"

Well, that's an obvious follow-up question in hindsight.

She hasn't really gotten into her whole virtualization situation in any detail, but there's no real reason not to explain.

"In a manner of speaking," she says. "My normal body has a heart, and so the crystal that sustains me is mimicking one — it contains the idea of a heart, alongside the idea of the rest of me. And when I set things up so that you can hear me, I made sure to include the ability to hear all of me, not just my voice, because people get subconsciously nervous when they talk to someone who doesn't have the ... necessary background sounds of a human. Breathing, heartbeat, and so on."

"So I was just curious, since cultivators have better senses, whether your senses were good enough to pick up on the sound of my heartbeat separately."