Research on the impact of "the belt and road" initiative on China's exports and foreign direct invenstment Research on the impact of bilateral investment treaties on Chinese outward foreign direct investment Research on the impact of the exchange rate fluctuation on the foreign direct investment Study on the impact of RMB appreciation on China's outward foreign direct investment Research on risk assessment and management of China's outward foreign direct investment = Research on risk assessment and management of China's outward foreign direct investment Research of the regional differences and spillover effects of China's outward foreign direct investment Research on home country effects of China's outward foreign direct investment Study on the trade effect and policy of China's outward foreign direct investment Research on the influence of "the Belt and Road" initiative on regional innovation efficiency