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Border areas are both important territorial security barriers and portals to the out-side world. Considering the complicated geopolitical environment of China＇s inland borders, analysis of the current status and mechanisms of influence of geo-economy in border areas is of great significance. Namely, this analysis is important towards leveraging traditional ad- vantages to accelerate China＇s development prehensive analysis, our study constructed n border and minority areas. Based on a com- a framework to analyze the geo-economy in border areas, and also introduced three indexes： local economy, export-oriented economy and local development. In addition, our study systematically described geo-economic evolu- tion in the border areas of China. We also analyzed the mechanism of geo-economic spatial differentiation in these border areas by using geographical detectors. Our results indicated that the level of geo-economic influence in border areas has grown steadily with significant spatial differentiation. The absolute geo-economic dominance of Northeast China gradually declines over time. Areas with geo-economic advantages are highly dispersed, showing a spatial polarization pattern with several polar nuclei including Mudanjiang city （Northeast China）, Baotou city （Inner Mongolia）, Bortala Mongol Autonomous Prefecture （Xinjiang）, Dehong Dai and Jingpo Autonomous Prefecture and the city of Chongzuo （Yunnan-Guangxi area）. Geo-economics in border area is mainly influenced by national policies, the develop- ment level of neighboring countries, as well as the desire of these countries to cooperate with China in bilateral trade. Favorable policies, traffic, cultural proximity and other factors also impact the geo-economics of border areas significantly. The Inner Mongolia and Tibet areas are mainly influenced by neighboring countries, while Northeast China and Xinjiang are mainly affected by Chinese policies; the Yunnan-Guangxi area is influenced by a combination of these factors. At the end of the study, we provide our recommendations for developing policies that further geo-economic advantages in complex geopolitical environments and in areas with varied development.

Rubber plantation is the major land use type in Southeast Asia. Monitoring the spa- tial-temporal pattern of rubber plantation is significant for regional land resource development, eco-environmental protection, and maintaining border security. With remote sensing tech- nologies, we analyzed the rubber distribution pattern and spatial-temporal dynamic; with GIS and a newly proposed index of Planted Intensity （PI）, we further quantified the impacts and limits of topographical factors on rubber plantation in the border region of China, Laos and Myanmar （BRCLM） between 1980 and 2010. The results showed that： （1） As the dominant land use type in this border region, the acreage of rubber plantation was 6014 km2 in 2010, accounting for 8.17% of the total area. Viewing from the rubber plantation structure, the ratio of mature- （〉10 year） and young rubber plantation （〈 10 year） was 5：7. （2） From 1980 to 2010, rubber plantation expanded significantly in BRCLM, from 705 km2 to 6014 km2, nearly nine times. The distribution characteristics of rubber plantation varied from concentrated toward dispersed, from border inside to outside, and expanded further in all directions with Jinghong City as the center. （3） Restricted by the topographical factors, more than 4/5 proportion of rubber plantation concentrated in the appropriate elevation gradients between 600 and 1000 m, rarely occurred in elevations beyond 1200 m in BRCLM. Nearly 2/3 of rubber plantation concentrated on slopes of 8~-25~, rarely distributed on slopes above 35~. Rubber plantation was primarily distributed in south and east aspects, relatively few in north and west aspects. Rubber planted intensity displayed the similar distribution trend. （4） Comparative studies of rubber plantation in different countries showed that there was a remarkable increase in area at higher elevations and steeper slopes in China, while there were large appropriate topog- raphical gradients for rubber plantation in Laos and Myanmar which benefited China for rubber trans-boundary expansion. （5） Rubber plantation in BRCLM will definitely expend cross borders of China to the territories of Laos and Myanmar, and the continuous expansion in the border region of China will be inevitable.

In this study, an efficient hybrid model is proposed to simulate the fluid flow in the reservoirs with multi-scale fractures, which cannot be easily modeled by neither the continuum models nor the discrete fracture models. In the proposed method, the small fractures are modeled by using an improved Multiple Sub-Region method, which can capture the strongly anisotropy of fracture elements and the effects of border region on the transmissibility and provide more accurate results, on the other hand, the large fractures are modeled explicitly as major fluid conduits by the Embedded Discrete Fracture Model. Then, an efficient numerical algorithm based on the Mimetic Finite Difference method is developed to solve the hybrid method. At the end, several numerical examples are carried out to verify the accuracy and applicability of the proposed numerical model.

The Reshian-Lamnian area within the Hazara-Kashmir syntaxis in Pakistan is composed mainly of the rocks of the Salkhala, Panjal and Murree formations. Base metal sulfide mineralization in the form of sphalerite and galena with lesser amounts of chalcopyrite and pyrite is present within the Salkhala Formation of the study area. Chemically all these ore phases are homogeneous in composition. The Pb isotopic composition of galena from the area suggests that there is very little or negligible variation in the ratios of ^206pb/^204Pb, ^207Pb/^204pb and ^208pb/^204pb. Modal ages ranging from 509 to 562 Ma and the p, values of 10.71 to 10.93 have been calculated for the studied Pb-Zn mineralization. On the basis of field features, mineralogy and Pb-isotope signatures, it is concluded that the Pb-Zn sulfide mineralization in the Reshian-Lamnia area is pre-Himalayan in age and can be correlated with the Cambro-Ordovician （Pan-African） orogenic event.

Frontiers of Economics in China （FEC） is one of the English Journals under the umbrella of Frontiers in China. The latter, as the largest series of academic journals with the broadest coverage in China, was launched in 2006 by China＇s Ministry of Education consisting of 17 disciplines in the fields of natural sciences and 7 in humanities and social sciences. FEC is a double-blind peer-reviewed economic journal co-sponsored by Higher Education Press, Beijing and Institute for Advanced Research OAR）, Shanghai University of Finance and Economics and is issued overseas by Brill, available both online and in hard-copy.

中华人民共和国国务院新闻办公室 2014年10月北京 前言屯垦戍边是中国几千年开发和保卫边疆的历史遗产。中央政府在西域新疆大规模屯垦戍边始干2000多年前的西汉，以后历代沿袭。1949年新疆和平解放，1954年中央政府决定在新疆成立生产建设兵团。这是符合中国国情和新疆实际的战略举措，也是历史经验在新的历史条件下的继承和发展。

A border region＇s initiative to raise awareness on HIV/AIDS through sex education,beginning in first grade,is changing mindsets While most schoolgirls have secrets Xiao Ping＇s is a little different.Every day,without fail,she finds a quiet corner to take a dose of medication, hiding her actions away from others, because she doesn＇t want to be asked questions.