Research on investment and financing policy of water environment protection 并列题名：Research on investment and financing policy of water environment protection Research on investment and financing activities of enterprises under shared economy Research on investment and financing behaviors of Chinese unlisted public companies Study on investment efficiency evaluation of enterprise environmental protection Research on investment and financing of publishing and media listed company NGOs in the area of water environment protection 并列题名：NGOs in the area of water environment protection Research on investment and financing system adapting to innovation-driven development Legal research on investment and financing of Chinese enterprises in the overseas countries