The inbound tourism is an important measure for development and internationalization of a tourism destination. By combining the theories of interpersonal relationship from sociology and distance attenuation of geography, we introduced a three-layer structural conceptual model, namely, Inbound Tourism Relationship Circle(ITRC), which includes the surrounding circle, the intra- continental circle, and the inter- continental circle. In order to illustrate the model, we use Hong Kong as a case study, and built ...