Chương 579: Chapter 580: Just Do the Olympiad Mathematics Instead

Gu Tingyun wiped her mouth with a handkerchief, scrumptiously finished the remaining apple himself, then got up to throw away trash and wash his hands.

The young man across from them was thinking: Why isn't his little brother as well-behaved and sensible as him?

All his little brother does all day is create a ruckus!

When Gu Tingyun came back, he dried his hands, took out a book from his bag, and sat next to the small table to start reading.

Seeing the words "High School Mathematics" printed on the book cover, the young man was startled: "Little bro, you're already in high school?"

He saw that his height was tall, but his face and body still had a naive air about them; he didn't look like he was of high school age!

"Eighth grade," Gu Tingyun responded flatly without lifting his head.

The young man was astonished: "Then why are you reading a high school mathematics book?"