Spring. Great disaster and great prosperity, the world is prosperous.

  Autumn at 12 years old.

  I and Xī Kōng, along with Xǐ Lè, tried to climb over the wall of the courtyard. Xī Kōng had made a tool for himself, which we called a tile remover, but he called it the Flying Sky Hook. The principle behind this tool was that a rope carried a hook. Xī Kōng thought this was the first stealth weapon developed by a young person, and at that time, we referred to people with good craftsmanship who could invent tools as "doers", so Xī Kōng called himself the Young Doer. However, the Flying Sky Hook was ridiculed by me and Xǐ Lè. We thought that a stealth weapon should be stealthy, but the Flying Sky Hook was too big, and someone unaware of its true nature would think it was for slaughtering pigs. Moreover, the purpose of a stealth weapon is to kill or at least injure people, whereas the Flying Sky Hook was actually used for climbing walls. Furthermore, similar wall-climbing tools had existed since the previous dynasty and were extremely popular among knights-errant and bandits, even sparking a revolution in house design - the eaves of high walls were no longer fixed but instead made with movable tiles that such hooks could not grasp. So I thought Xī Kōng was unoriginal, and Xǐ Lè said he plagiarized.

  My excuse is that I didn't copy anyone else's, although I have seen what a wall-climbing hook looks like and I really like it. But this hook of mine is different from theirs, even if the shape is similar. Look, theirs has four hooks, but mine only has three. And the knot between their rope and hook is a dead knot, while mine is a butterfly knot. Most importantly, the names are not even the same - theirs is called a wall-climbing hook, while this one is called a flying-to-the-sky hook. How can that be considered plagiarism?

  For this, we specially went to the master's presence and asked the master to judge. The master took a look and said, "I heard that you invented something yourself, but also said that you were copying." I was worried, so I took a closer look, and I even bought a previous dynasty's wall-climbing hook to take a look. Only then did I feel at ease. At most, it can be said that it is an imitation, but it cannot be said to be plagiarism.

  Master said to Jile and me: "Jile, Shiyuan, your elder brother has finally made something, although it's a bit outdated and can't climb the walls of today, but at least it can still climb trees. You two should also focus on inventing, use your own brains. In these few years, the Jianghu has been relatively peaceful, the people are living in peace and prosperity, you should accumulate more, when the world is in chaos, it will definitely be useful. These few years, hidden weapons have developed rapidly, but orthodox hidden weapons all have orthodox defensive tools, only what you make yourself can achieve a surprise victory."

  I said, Master, isn't this a heretical and evil path that Shaolin does not advocate?

  The master said, no, this is heresy.

  I said, what is heresy then?

  The master said that Wudang's own hidden weapons are just evil and heretical.

  I'm going with Xile tonight.