Who knows the origin of the nine-ring chain?

Nine-ring is a kind of intellectual toy that spreads among Shanxi people. It uses nine rings in a string and wins by unraveling them. Ming's "Total Record of Dan and Lead" records: "Nine chains, two connected into one, combined into one, solved into two, combined into one." When making, nine small rings are made of metal wires, which are connected and sleeved on strip-shaped transverse plates or various frames. The handle of the frame is sword-shaped, wishful-shaped, butterfly-shaped, plum-blossom-shaped and so on, and each ring is connected with it by copper bars. When playing, all nine rings are connected to the copper ring according to law, or all of them are untied after putting on sleeves. Its solutions are diverse, separable and changeable. The winner needs 8/kloc-0 times to arrange nine connected rings in a row, and then it takes another time to untie all nine rings. In addition, it can also be set into flower baskets, hydrangeas, palace lanterns, etc. /Jiuhuanhuan/Zhang 1-yi4/ Jiuhuanhuan 1.php