This paper, based on a case study on fifteen cities during 1995—2006 in Xinjiang, applies standard deviation and variation coefficient to quantitatively study the temporal difference of the third industries from absolute deviation and relative deviation, and to study the spatial structure from distance and ratio index, and to study the development speed from relative development ratio. The authors present some approaches to regional development of third industries.

A challenging situation over the urban land resources necessitates a sustainable development for lands, so the recycling economy as a new economic development mode is a strategy aiming at the sustainable development. This paper studies the theory from its origin, features and principles, insists that the sustainable development of the urban land resources must be based on the recycling economy, which is an unavoidable choice, and presents the principle of 3R for economy in practice.