In the digital era, emerging technologies such as artificial intelligence, big data, and blockchain have revolutionized various ways of people's daily lives and brought many opportunities and challenges to the industries. With the increasing demand for talents in the fintech realm, this book serves as a good guide for practitioners who are seeking to understand the basics of fintech and applications of different technologies. This book covers important knowledge in statistics, quantitative methods, and financial innovation to lay the foundation for fintech. It is especially useful for people who are relatively new to this area and would like to become professionals in fintech.