Zhuge Liang did not concern himself with how his actions might cast a shadow over Lu Xun's future, having undergone an ability test himself before. Moreover, the test he faced was a high-level one, led by Chen Xi with the assistance of Lub Su, Liu Ye, Jia Xu, Li Youu, Man Chong, Mi Zhu, and other such individuals.
At the time of that test, Guo Jia was absent, thus his role was filled by Fa Zheng. Whenever Zhuge Liang recalled that test, he felt that having gone through it once, he was under no pressure when it came to any assessments. Can you imagine the kind of shadow that would be cast if a group of the top contemporaries tested you in the very area you were most skilled in?