Many jigsaw puzzles read stories this year.

Perhaps the history of Tangram can be traced back to the ancient book "The Book of Changes Bisuan Classic" in China before Qin Dynasty, in which there is a tangent square, which is used to prove the Pythagorean theorem. At that time, the big square was cut into four identical triangles and a small square, not a puzzle. The present jigsaw puzzle has experienced a historical evolution. It developed from Yan Ji Tu in Song Dynasty to Die Ji Tu in Ming Dynasty, and then to Qiao Qi Tu in early Qing Dynasty. It has a history of more than 2500 years.

/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". In Europe, The New China Children's Mystery published about 1805 contains 24 puzzles and a wooden puzzle. Subsequently, the books on Tangram were published in French in 18 10, and in German and American in18/0/8. The Italian books also introduced the history of China. In the preface of these books, it is said: This is a recreational game. Men and women, old and young, dignitaries and ordinary people are all Xian Yi, and they will not let you lose money like other gambling tools.

Dutch writer Gao Luopei wrote in his novel that a dumb boy supplemented his gestures with jigsaw puzzles. It is said that French Napoleon often played jigsaw puzzles to kill time after he was exiled.

Tangram spread to Europe and is still very popular today. 1978 JoosfElffers, a Dutchman, wrote a book about Tangram, and collected 1600 kinds of graphics, which were translated into many languages and published.