The objective of this book is to advance awareness and sensitivity towards the special social and personal needs of people with all kinds of disabilities, of all ages, from infancy to adulthood. It proposes a theoretical background for understanding the situation of people with disabilities. It also introduces an innovative, practical work method, i.e., the CIL which helps this population cope with the social and personal hardships it faces. This book is intended to serve as a tool for anyone engaged in promoting the welfare of people with disabilities. In summary: the book is based on theory and research, including the experience of practical application. It discusses the implications of the theory for universal practice and draws on real-work examples and practices to illustrate points. Since weathered crust elution -- deposited rare earth ore was discovered, the basic researches on the metallogeny mechanism, the prospecting rule and the production have been studied continuously for more than thirty years. The three leaching technologies of bath leaching with sodium chloride, bath leaching with ammonium sulphate and in-situ leaching with ammonium sulphate are developed sequentially. All of these contribute to the industry of the weathered crust elution-deposited rare earth ore. However, there was no systematic work on the weathered crust elution - deposited rare earth ore in the past due to many reasons such as the confidentiality, which was not beneficial for the development of this ore. The metallogeny theory and mining technologies of the weathered crust elution - deposited rare earth ore are introduced systematically in this book for readers.