Detective Training Manual

Please remember, never dig into those unsolved mysteries. Because you'll never know how much people paid to cover them up.Beneath the false calm surface, most truths are cruel...Alright, let me be clearer.If one day, on your way home from work, you see a book fall on the ground, restrain your curiosity, and never touch it.... Unfortunately, the original Zhou Yan didn't realize this.So he picked up that book.The book has a very awkward name ——— 《Detective Training Manual》As for the author... it's called Fei Gua.