This book is a Chinese translation of heterocyclic chemistry (4th edition) co-authored by Professor J·A· Joule and Dr K Mills, an internationally renowned authority on heterocyclic chemistry, which embodies the author's painstaking efforts and latest research results. This book introduces all kinds of aromatic heterocyclic compounds from the aspects of structure, spectral properties, reaction properties and synthesis methods, and introduces the applications of heterocyclic compounds in solid-state reaction, pharmaceutical industry and electronic industry. This book is rich in content, citing a large number of documents, reflecting the new achievements in heterocyclic chemistry research.