Noon, Capital International Airport.
The flight that Zhao Yi was on arrived on time. He got off the airplane and followed the crowd out of the airport, and then saw a sign saying 'Welcome, Zhao Yi'.
The person who came to pick him up was a young man wearing glasses named Xu Chao, who looked like he was under thirty and had a scholarly air about him. It turns out he was a Ph.D. student.
"I just came from Xiamen and work in the school's Intelligent and Automatic Laboratory."
"Professor Luo told me to come pick you up."
"Zhao Yi, your 'sieve method' is really powerful. I carefully studied your paper and there are some parts that I simply do not understand. Are you really a high school student?"
Xu Chao closed the car door with a bitter smile and said, "After reading your paper, I feel like I've been reading in vain."
Zhao Yi just laughed.
Along the way, Xu Chao kept talking about the sieve method and asked a few related questions.