Two kinds of “China puzzle”are pointed.One is named “unhappy economic growth,”where rapid economic growth brought decrease rather than increase in happiness(Brockmann et al.).The other is concerned itself with differential subjective well-being felt among migrant workers in China where migrant workers in more developed cities feel more frustrated than those in less developed cities,though the former surely enjoy the better life objectively than the latter.The present paper attempts to formalize those situations mathematically to explain“why so”from a single theoretical framework of relative deprivation,which has been developed by Stouffer and others’ The American Soldier and further elaborated by Runciman and Yitzhaki. Two kinds of “China puzzle” are pointed. One is named “” unhappy economic growth, “where rapid economic growth reduces rather than increase happiness (Brockmann et al.). The other is concerned itself with differential subjective well -bearing felt among migrant workers in China where migrant workers in more developed cities feel more frustrated than those in less developed cities, though the former surely enjoy the better life objectively than the latter. present paper attempts to formalize those situations mathematically to explain ”why so" from a single theoretical framework of relative deprivation, which has been developed by Stouffer and others’ The American Soldier and further elaborated by Runciman and Yitzhaki.