How traditional (stay-at-home mother) are modern city upper, middle, lower class Chinese couples typically? If this is a survey of attitudes, what is the actua

How traditional (stay-at-home mother) are modern city upper, middle, lower class Chinese couples typically? If this is a survey of attitudes, what is the actual reality of behavior in terms of salary ratios? At some income ratio, wouldn't it make more sense for a woman to stay home because of the greater utility of motherhood, homemaking, wife, and so forth? How common are high-income women with stay-at-home dads?