Lu Yiqing, a medical scientist in the Qing Dynasty, wrote in "Cold Land Miscellaneous Knowledge": Song and Huang thought that there were several pictures, several squares and seven long festivals, which were divided into twenty-five bodies and became sixty-eight. Several pictures of butterflies are very clear, but the system has been modified, and triangles are staggered into hooks, such as butterfly wings. Its formula three, its system six, its dozens of three, its variant, where more than one hundred. Recently, there are seven clever diagrams, the formula is five, the number is seven, and there are more than a thousand kinds of changes. The body is simple and changeable, and the tools of the game are enough to dispel boredom and break the silence, so secular people like it.
Lu Yimeng named the invention path of jigsaw puzzle, from Yan Ji to Butterfly Ji, and then to Qiao Qi Tu. Yanji and Dieji are jigsaw puzzles, playing different roles respectively.
"Tangram" was widely spread all over the world in the19th century, and was called "Tangtu" by westerners, which means "China's drawing board", which is the embodiment of Chinese wisdom.
Speaking of "Tangtu", it is naturally related to the Tang Dynasty, and its invention was inspired by "Yanji" in the Tang Dynasty. "Banquet" means "banquet", and the so-called "banquet set" is several cases created by the people in the Tang Dynasty to entertain guests.
In the Northern Song Dynasty, Huang, a Langguan, further improved this "inkstone collection" and designed several series of six-piece long schemes, which could be assembled according to the number of guests and displayed separately from ancient books.
The origin of jigsaw puzzles:
The jigsaw puzzle used now is evolved from furniture. There was a man named Huang in the Song Dynasty. He likes geometry very much. One day, his family treated him. The table for entertaining guests is a "banquet" composed of six small tables invented by him. Later, people changed it into seven tables, so that different shapes can be changed according to the number of people eating. For example, three people make a triangle, four people make a square and six people make a square, which is very convenient.
In the late Ming and early Qing dynasties, people in the palace often used it to celebrate festivals and entertainment, and put all kinds of auspicious patterns and words together. /kloc-in the 0/8th century, jigsaw puzzles spread abroad, which immediately aroused great interest. Some foreigners play with it day and night, calling it "Tangtu", which means "Puzzle from China".
Later, someone reduced the banquet to only seven boards, used it to puzzle and turned it into a toy. Because it is very clever and interesting, people call it "Tangram". So it evolved from furniture to today's geometric puzzle game.