Even though the original self is a girl, she's studying mechanical engineering and has always excelled in her major. Despite not being good at communication, her excellent grades and love for research makes her a favorite among the professors.
As for why Ye Qiu chose an intern job as an office clerk, it involves her relationship with her dorm mates and her relationship with her adoptive family.
Among Ye Qiu's university roommates was Xie Lizzi, whose family runs a large corporation specializing in intelligent robots and similar things. She enrolled in this school to join Professor An's research group, but Professor An favored Ye Qiu. Moreover, the senior she admired once praised Ye Qiu, which only deepened her enmity towards Ye Qiu.
She used all means to investigate Ye Qiu's background, discovered that she was adopted, and knew she was not loved by her adoptive parents before she started to boldly target Ye Qiu.
