辽宁与朝鲜经贸合作的战略思考

辽宁省边境地区与朝鲜的经济贸易合作不仅是辽宁对外开放总体战略的重要组成部分，而且关系到我国的国家利益。分析了中朝双方经贸合作的基础和优势，对双方经贸合作的现状和存在的问题进行了较深入地探讨，并提出了加强双方贸易秩序管理，建立贸易信息平台，广泛开展多方式、多层次的经贸合作等相应的对策和建议。

On static term structure of China’s foreign exchange reserve investment based on NS model

The data of treasury bonds of different maturity in USA, Europe and Japan from 2007 to 2015 are selected as samples. Empirical study on term structure of static interest rate is conducted by applying Nelson-Siegel model(NS model). And the optimization strategy of term structure of China’s foreign exchange reserve investment is analyzedby taking USA treasury securities as example. The result shows that:China should increase the proportion of short-term USA treasury securities in 2007, and keep increasing the proportion of short-term USA treasury securities and reducing the long-term ones in 2008. From 2010, the proportion of short-term USA treasury securities should be reduced and the long-term ones should be increased. From 2013 to 2015, the holdings of short-term USA treasury securities and treasury inflation-protected securities(TIPS)should be increased, while the treasury securities with long remaining period should be sold, and the investment in real estate, stocksand corporate bonds should be enhanced, in order to reduce the proportion of USA treasury securities.