Qian Yanjun, Song Zhiqiu, and a few others raised their heads in silence. They didn't really understand this question.
As a top student, Ye Jian pondered for a moment before replying, "I don't particularly like any of them. Someone told me about them before, that's why I'm a little interested."
When Xia Jinyuan sent her to school, he talked about many classes. He emphasized cryptography, such as the trifid cipher, ADFGVX cipher, Playfair cipher, and four-square cipher. He suggested she study cryptography.
She had never interacted with it before. Additionally, he said that his cryptography was not bad. Ye Jian, who wasn't very interested at first, got interested too.
The top student from Shanghai was less excited when he heard this. He replied dejectedly, "Oh." In less than three seconds, he asked again, "Have you gotten an understanding about it?"
