Lu Jiao's eyebrows twitched as she carefully glanced at Xie Yunjin. This guy wouldn't suspect anything, would he?
To her relief, Xie Yunjin showed no suspicion and asked with interest, "What kind of math?"
After the First Born dipped his chopsticks in his soup, he wrote several numbers on the table. Lu Jiao hadn't taught him how to write numbers yet, but he was able to write them down crookedly from memory.
"Mommy said these are from zero to ten." The First Born explained.
Xie Yunjin recognized that this must be something from Lu Jiao's world, but he was still surprised to see this kind of arithmetic notation. He had never seen anything like it before.
Xie Yunjin didn't really understand it. Lu Jiao explained, "This is a new counting method that I developed. It's more convenient."
Xie Yunjin smiled and said, "Can I learn it too? It'll be useful to use it for counting in the future."
