In the book "Socially Responsible Investment", Emilio Domini mentioned three basic methods of socially responsible investment: portfolio screening, direct dialogue with companies, and investing in community development financial institutions. Portfolio screening is the first stage of socially responsible investment and also the simplest and most feasible way. The second stage of socially responsible investment is direct dialogue with companies, which is a relatively advanced process. The third method mentioned by Domini is "investing in community development financial institutions". In short, it is to build a harmonious community with the power of financial institutions.