People always say "Life goes downhill after forty", but why am I already in such a state at thirty? It's as if I woke up one morning and had lost all my energy and spirit. Come to think of it, in the past two years, my hair has been thinning more and more, my stamina has been weakening, and even the nightly entertainment activities with my wife have lost their former appeal. After much deliberation, it must be due to the aftermath of donating blood last year; losing 200cc of blood was too much for my constitution to handle. Since then, I've been constantly plagued by illnesses—one person catching a cold at school guarantees that it will be me.