Study on the driving mechanism and reverse technology spillover effect of China's outward foreign direct investment Reverse technology spillover effects of Chinese outward foreign direct investment Study on the industrial transfer effect of China's outward foreign direct investment Research of the regional differences and spillover effects of China's outward foreign direct investment A study on the industrial transfer effect of China's outward foreign direct investment Study on the development path and determinants of China's outward foreign direct investment Study on the trade effect and policy of China's outward foreign direct investment A study on the development path and determinants of China's outward foreign direct investment Study on the impact of RMB appreciation on China's outward foreign direct investment Research on spillover effect of outward foreign direct investment