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Did the junior champion spell the number 1 to 5 with a complete puzzle?
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Tangram is an ancient traditional intellectual toy in China. As the name implies, it consists of seven boards. These seven boards can be combined into 1600 kinds of figures, such as triangles, parallelograms and irregular polygons. Players can also combine them into various characters, images, animals, bridges, houses, towers, etc., or some Chinese and English letters.

Tangram was invented by the working people in ancient China, and 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 in China.