Wen Renjie, the youngest history professor at the university, took over this secret from his grandfather when he was dying. He contacted the National Supernatural Investigation Bureau with this secret and led dozens of ancient weapons investigators from the Supernatural Investigation Bureau to the ancient underground experimental city of Liangchao Guifang to fight with a group of remaining biological weapons. Finally, he successfully destroyed the biological weapons with modern weapons and took out the tortoise shell classics.
