Upon hearing the words "formula derivation diagram," Qin Nanyu's emotions subtly withdrew, and his gaze fell onto the notebook that was placed in front of Lei Yunjia.
He recognized that this notebook did not belong to the ones that would appear in the data room, and as he wondered whether it was her personal notes, he heard Lei Yunjia already asking out loud.
"I haven't seen this notebook before, is it yours?"
"Mhm, when I'm organizing data, if I see an interesting problem-solving formula, I'll record it." Ji Weitian said as she opened the notebook for Lei Yunjia, directly flipping to the page where she had derived the formula.
There was a complete process of formula derivation on that page, and she had even made notes on the key points for solving problems.
Primary were explanations of algorithms and directions for optimization.
Lei Yunjia's expression changed as soon as he saw the content of her notes.
