Since time immemorial, my country has had little inventions, little ideas, such as the nine chains, which combine wisdom and pleasure, and which have continued to this day to be well received, with a number of celebrities obsessed and nine chains symbolizing wisdom and wisdom. Each of the nine chains is bound by each other, and only the priority rings are free to go up and down. If the n-ring is to be down/up, two conditions must be met, except for priority. 1. The n-1 ring is on the shelf; all the rings in front of the two n-1 ring are not on the shelf. It's a nine-link thing to try and meet two conditions above. The decomposition of the nine chains is essentially to start from the back of the rings, but the first one is for the back of the rings and the first one is to be loaded, not really taken off. To enter the ninth ring, two conditions must be met: the eighth ring is on the shelf, and priority — none of the seven rings is on the shelf. In the initial state, the former is satisfied, and now the latter. In this line of reasoning, the seventh ring, the first ring, not the second ring, has been introduced. The second ring is the even-number chain solution. The top-down ring is followed by the top-down ring, so it's two steps at the same time in practice. There are only two ways to go in any normal situation: one ring up and the other. One of the paths has just come, and cannot be repeated, or it will be taken back. In this way, the chain would be forced to follow the right path. And many people, because they're not familiar with it, often turn back and can't break the chain. The first thing to do is to think more about the nine chains, and the three rings must be crafted, bearing in mind the top and the bottom. There is no need for reasoning. In the early days of the han people's intellectual toys in shanxi province, a number of famous people have been very fond of them, including west han's daughter, and the wife of zhu wenjun, who had given his family the same name, mentioned the nine chains: "the eight lines are unpaved, the nine chains are broken, and the eyes of ten miles long, and hundreds of minds, memories, and all kinds of grievances."