Chapter IV is the study of the ECI factor and its index system. It explains the course of how to gain the index system of the ECI and its scientific basis. This chapter is the core part of this study.

第四章为就业信心指数的因子分析和指标体系研究，指明了得出就业信心指数指标体系的来龙去脉及其科学依据，是本研究的核心部分。

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Spatial structure is not only a regional structure of the main elements of scientific research, but also one of core issues of tourism study.

空间结构研究既是区域科学研究的主要内容，也是旅游学研究的核心问题之一。

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