```
Chen Yiwen sat there, occasionally glancing at the two women.
Actually, from the moment Qiao Ze saw Hanna, he knew that this Austrian woman was most likely not a spy, at least not for the papers on lithography machines.
Even his proactive question was meant to quell Chen Yiwen's messy thoughts.
It was mainly based on a deduction of the time difference.
From Li Jian Gao's introduction, Qiao Ze knew that the woman had just come to report as an exchange student. According to the school's application and approval rules for international exchange students, her application for an exchange had to have been made at least twenty days ago, in order for her to have recently received a notice to apply for a visa.
Calculating the time, twenty days ago was just when his research group had published two papers.
At that time, he didn't even know he would write and publish the two papers in "Science".
