Chinese private enterprises overseas direct investment index 2017 annual report Chinese private enterprises overseas direct investment index 2018 annual report 并列题名：Chinese private enterprises overseas direct investment index 2018 annual report Chinese private enterprises overseas direct investment index 2019 Chinese private enterprises overseas direct investment index 并列题名：Chinese private enterprises overseas direct investment index Chinese private enterprises outward foreign investment index (2021) Chinese private enterprises outward direct foreign investment index 并列题名：Chinese private enterprises outward foreign investment index (2021) 并列题名：Chinese private enterprises outward direct foreign investment index