C1277 Underground Research Institute

Under Professor Zhang's lead, Li Yun entered the underground part of Qingya Institute.

The two of them entered an elevator. Li Yun saw that the elevator only had five buttons: ABCDE, while Professor Zhang chose C.

Li Yun didn't ask where the buttons were and just drove the elevator straight down.

But after several minutes of descending, Li Yun finally could not help but ask