“…Since the emergence of the Easterlin Paradox, scholars have tried to crack the happiness code from different perspectives [ 14 ]. From absolute income to relative income to income inequality, income has been an important focus of scholarly attention [ 5 , [15] , [16] , [17] ]. In addition, there have been a variety of studies on the relationship between happiness and socio-demographic factors, such as age, gender, education, marital status, health status, housing status and religious beliefs [ 6 , [18] , [19] , [20] ].…”