Based on the systematic analysis of the development of Russian foreign trade and the characteristics of the regional distribution structure of trade, this work further studies the influencing factors of Russia’s foreign trade by using the R language regression analysis method and constructs three econometric models from import, export, and total import and export. The real effective exchange rate and various instruments and equipment and accessories are the main factors affecting Russia’s import trade, energy, minerals, timber, and related products are the main factors affecting its export trade, and Russia’s GDP and international oil prices are the major factors affecting the total import and export volume. A correct understanding of the factors affecting Russia’s foreign trade will help to understand Russia’s economic and trade development and its changing trend and provide a reliable reference value for the further expansion and optimization of economic and trade cooperation between other economies and Russia.

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After 21 st century, the continuous disequilibrium of Chinese balance of payments (BOP) has become a significant issue faced by Chinese macroeconomic development. As can be revealed by the research, Chinese BOP was relatively stable and balanced from 1982 to 1993; from 1994 to 2011, it remained continuous "twin surplus" situation; since 2012, Chinese BOP has got rid of "twin surplus" condition. In recent years, BOP disequilibrium has imposed various negative influences on Chinese economic development including trade frictions, CNY depreciation pressure resulting from continuous large reserve asset surplus, severe capital flights, etc. Chinese government shall continue encouraging domestic enterprises to invest overseas and reinforcing foreign economic and trade cooperation, and meanwhile it is expected to strengthen its monitoring on trade, to strengthen curbing capital flights and to improve Chinese economic and financial regime further, so that Chinese BOP can get prone to equilibrium, and therefore Chinese national economy can be guaranteed to develop stably and sustainably.

Abstract-DPRK's foreign trade, of which the structure has the characteristics of exporting primary products, importing industrial manufacture and exchanging resources with products, is easily influenced by domestic and international political circumstances. On the fundament of summarising the DPRK's foreign trade development, this dissertation is going to analyse the foreign trade structure and the influential factors positively in accordance with relevant statistical data, and the major factors that determine and restrain DPRK's foreign trade, as shown by outcomes of the analysis, are DPRK's unreasonable industrial structure, low degree of productivity development and the economic politic decision-making mechanism that still remains under the circumstance of planned economy system. Under the circumstance of economics globalisation deepening increasingly, DPRK is supposed to break through limitations of conventional planned economy system, to actively and reasonably bring in market economics, to coordinate the relationship between the project and market and to actively develop foreign trade, which is expected to significantly promote the DPRK's domestic economic development, therefore becoming a flourishing country.

Investment facilitation is an important guarantee for the rapid development of investment activities. In this paper, the relatively complete investment facilitation evaluation system is constructed. The investment facilitation level of 101 countries and regions globally is measured by the principal component analysis method. The feasible generalized least squares method (FGLS) is used to empirically test the impact of the host country's investment facilitation level on China's OFDI. The results show significant differences in the level of investment facilitation among regions, and there is still great room for improvement; China's tends to invest in countries with higher investment facilitation comprehensive index. When investing abroad under different investment motives, market-seeking, efficiencyseeking, and strategic asset-seeking foreign direct investment tend to favor host countries with a higher comprehensive index of investment facilitation. In comparison, resource-seeking foreign direct investment tends to favor facilitation host countries with a poorer comprehensive index.