Tangram is an invention of working people in ancient China. Its history can be traced back to at least the first century BC, and it was basically finalized in the Ming Dynasty. Ming and Qing dynasties were widely circulated among the people. Yi wrote in Volume I of Cold Records Miscellaneous Knowledge: "There are seven wonderful ideas recently.

Its formula is five, its number is seven, and its variation formula is as many as 1000. Things are small in shape, changing at will, and full of games, which are enough to relieve boredom and break the silence, so secular people like them. "

I don't know when, the "seven clever pictures" spread abroad and were welcomed and valued by them. Needham said it was "one of the oldest pastimes in the East", and the library of Cambridge University in England still has a "Seven Clever New Books". American writer Edgar Allan Porter refined a puzzle with ivory. French Napoleon also used jigsaw puzzles as a pastime in exile. Who would have thought that Tangram would have something to do with Napoléon Bonaparte, Adam, Du Lei, Poe and Carol? In fact, they are all fans of jigsaw puzzle.

Have you ever played jigsaw puzzles? Those simple seven boards can spell out ever-changing figures. Who would have thought that this kind of toy evolved from an ancient furniture?

There was a man named Huang in the Song Dynasty. He was very good at geometry. He was hospitable and invented a "banquet table" consisting of six small tables-a small table for eating.

Later, someone improved it into a seven-table banquet. According to the number of people who eat, the table can be put together in different shapes, such as three people putting together a triangle, four people putting together a square and six people putting together a hexagon ... so that everyone is convenient and the atmosphere is better.

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".

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. The Palace Museum still keeps the puzzles of that time!

/kloc-in the 0/8th century, the jigsaw puzzle spread abroad, which immediately aroused great interest. Some foreigners played all night and called it "Tangtu", which means "Puzzle from China".