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. Since artificial intelligence was born, people have been concerned about whether it will surpass human intelligence and dominate the human world. Will this become a reality? By reading this book, you will have a clearer understanding— AI exists as a tool. It is the extension of human exploration and the means for people to create and transform the world. So, join us to explore the world of artificial intelligence together!