The 15-piece puzzle is a game in which 15 pieces of different shapes are cut into a square section to form various geometric figures. It can form patterns of people, animals, fruits and vegetables, flowers, utensils, etc. It was invented by Tong Yegeng, a native of Chongming County, Jiangnan Province during the Tongzhi period of the Qing Dynasty, and he has a monograph "Puzzle Picture". It combines the Yan Ji picture of the Song Dynasty, the 13-style butterfly picture of the Ming Dynasty, and the tangram, and has developed the Chinese puzzle culture to the extreme. It was introduced to Yangzhou shortly after its birth, mainly through family inheritance and master-apprentice inheritance. It became popular throughout the country and spread to Western countries in the early 20th century. The representative inheritor Zhu Jianhuai inherited the essence of traditional puzzles and incorporated modern elements to create a large number of thematic puzzles. Pictographic expression, clever changes, and ingenious integration of the mind are the important features of the 15-piece puzzle; the way of using local materials and scenes to make puzzles can reflect the local customs and feelings to express feelings, teach through entertainment, develop intelligence, and improve the moral education level of young people. It has been included in the "Labor and Technology" teaching course of primary schools in Jiangsu Province. (No pictures available, please provide them.) (No pictures available, please provide them.)