"Tangram", also known as "wisdom board", is a puzzle tool in ancient my country. There are rectangles, parallelograms and triangles in the tangram. There are not many of them, but they can spell out many kinds of graphics. For example, they can spell out ten numbers from 0 to 9, or Chinese Pinyin letters, and they can also spell out geometric figures, animals, buildings, etc. Those simple seven boards can actually create ever-changing graphics. Who would have thought that this kind of toy evolved from an ancient piece of furniture.

In the Song Dynasty, there was a man named Huang Bosi who was very knowledgeable about geometric figures. He was very hospitable and invented a "banquet table" composed of 6 small tables - a small table for entertaining guests.

Some people later improved it into a banquet table consisting of 7 tables. The tables can be assembled into different shapes according to the number of people eating, such as 3 people forming a triangle, 4 people forming a square, 6 people form a hexagonal shape... This makes it convenient for everyone during the meal and the atmosphere is better.

Later, some people reduced the banquet to only seven boards, used it to puzzle, and evolved into a toy. Because it is very clever and fun, people call it "tangram".

At the end of the Ming Dynasty and the beginning of the Qing Dynasty, people in the palace often used it to celebrate festivals and entertainment, and formed various auspicious patterns and words. The Palace Museum still preserves the jigsaw puzzle from that time!

In the 18th century, the jigsaw puzzle spread abroad and immediately aroused great interest. Some foreigners stayed up all night playing it and called it "Tangtu", which means "jigsaw puzzle from China".

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