Research on the regional differences and spillover effects of China's outward foreign direct investment 并列题名：Research on the regional differences and spillover effects of China's outward foreign direct investment Reverse technology spillover effects of Chinese outward foreign direct investment Research on risk assessment and management of China's outward foreign direct investment Study on the industrial transfer effect of China's outward foreign direct investment Study on the driving mechanism and reverse technology spillover effect of China's outward foreign direct investment Research on spillover effect of outward foreign direct investment Research on the impact of bilateral investment treaties on Chinese outward foreign direct investment 并列题名：Study on the industrial transfer effect of China's outward foreign direct investment Study on the trade effect and policy of China's outward foreign direct investment