I have always stubbornly believed that "once" is a very cruel word. It is often used when people recall the past, and usually with a touch of melancholy. I don't want to think that many years later, when I already have a lot of helplessness, I still have the idea of writing a novel but failed to do it...
Therefore, I wrote this article which may seem exaggerated and childish, but I am sure that as long as you read it carefully, you will definitely find that there is actually a lot of happiness and touching hidden in this text, like your flying youth and the unrestrained smile on your face!