Research on the impact of online payment on household saving rate 并列题名：Research on the impact of online payment on household saving rate Research on the effect of life expectancy on national saving rate 并列题名：Research on the effect of life expectancy on national saving rate Research on the impact of monetary policy uncertainty on the RMB exchange rate research on the impact of e-hailing on the travel industry 并列题名：Research on the impact of monetary policy uncertainty on the RMB exchange rate Research on the impact of housing wealth on economic behaviors of households Theoretical research on the impact of online public opinion on corporate value