This is a set of introductory books on Chinese modern technology. Since the beginning of the 21st century, mobile payment, online shopping, artificial intelligence (AI), and 3D printing have been developing rapidly in China. The life of the Chinese is inseparable from the four technologies nowadays. Why do mobile payments and online shopping grow so fast in China? What can 3D printing do? Will AI rule humanity eventually? This series of books will take you back to the development of the four new technologies to find the answers. The pursuit of standardization and personalization runs through the entire history of human development. This pair of contradictory concepts seems abstract, but they were the cause of the industrial revolution, which led to the development of 3D printing. This book explains profound theories in simple language. From the perspective of 3D printing, it integrates the standardization and personalization concepts of human production into every historical event and emerging technology it covers. By asking questions like “ What can we make using 3D printing technology?” the reading journey of this book will evoke children’ s imagination.