This study finds that Chinese consumers' perception of country image can be divided into four dimensions: appraisal of the relationship with China, degree of country development, general product appraisal, and general people appraisal. The items in these four dimensions vary for different countries. The study incorporates country image into the Fishbein's model, and finds good fitness between the model and data, which suggests that the Fishbein's model has good generalizability and cross-culture adaptability. Results show that country image has no direct impact on purchase intention; instead, it impacts on consumers' purchase intention indirectly through the effects on functional appraisal and symbolic appraisal, brand attitude and subjective norm. The effect of country image on purchase intention varies for different products. Specifically, the effect of country image on purchase intention of apparel is greater than that of cell phone, and that on purchase intention of car is the lowest.

The Shenfu gas field on the eastern margin of the Ordos Basin is one of the key blocks of CNOOC’s land tight sandstone gas field development in recent years. In order to further analyze the physical properties and accumulation and evolution characteristics of the Upper Paleozoic tight sandstone gas reservoirs in the Shenfu block, we characterized of the reservoir pore structure, diagenetic evolution, and natural gas accumulation stages, combined with fluid inclusions, the types of tight sandstone gas reservoirs in the Upper Paleozoic are studied, revealing the main controlling factors for the natural gas accumulation in the study area. Studies have shown that the core porosity of tight sandstone reservoirs in the Upper Paleozoic in the Shenfu block is less than 10%, and the permeability is less than 1mD. Compaction and cementation are the main factors for reservoir tightness. The results of porosity evolution and homogenization temperature of fluid inclusions indicate that the Upper Paleozoic sandstone tightness is formed during the Middle-Late Triassic-Early Jurassic, which is earlier than the Late Jurassic-Early Cretaceous period of large-scale natural gas accumulation.