Fifteen years have past since the first edition of The Chinese Fossil Reptiles and Their Kins was published. Like its first edition, this second edition remains to serve as an introductory manual of the Chinese lower vertebrate fossils and primitive birds for paleontologists and non-professionals alike.This thoroughly revised and updated edition has incorporated 172 new genera and 219 new species discovered in the past 15 years in China. Most of them came from the materials collected during the China-Canada Dinosaur Project in northwestern China, the Jehol Biota in northern China, the Dashankou Fauna in Gansu, and the Triassic marine fauna in Guizhou.In addition, cladograms are introduced in the new edition, representing our current understanding of the relationships within the Amphibia,Anapsida, Diapsida, Squamata, the basal groups of Lep dosauromorpha,Archosauromorpha, Crocodylomorpha, Pterosauria, Ornithischia,Saurischia, Aves, and Synapsida. Linnaean system of classification,however, is retained in this edition.