“…Specifically, the level of socio-economic development, bank interest rates, population mobility status, taxation, child-care services, education preferences, and housing price regulation indirectly influence it [22], while payment method, compensation policy, the contribution rate, and the number of insured people are the direct factors that have greater impacts and higher frequency [23][24][25]. 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 At present, there are few studies on the sustainable development of the maternity insurance system, mainly focusing on the impact of population policies on the MIS [12,15]. Some researchers have focused on the maternity allowance, operation of the maternity insurance fund, and reform of MIS [13,[26][27][28].…”