Senior Year of High School: My Backer Awakens from the Book of Mountains and Seas Devouring Beast

The protagonist, Li Muming, traveled from modern times, and his soul is attached to the body of a senior high school student of the same name in 2099. The original owner was ridiculed by his classmates for "not having the qualifications to awaken". He accidentally fainted during a simulation training with an alien beast, allowing Li Muming from forty years ago to be reborn. With his modern "cultural understanding" of "The Classic of Mountains and Seas" (rather than the "survival manual" understanding of this world), he encountered the low-level alien beast "Fei" during his first off-campus practice. When he was about to die, he mistakenly swallowed its crystal core and awakened the "touch of corruption"