“…Among them, objective socioeconomic status was measured by education level, occupation, and monthly income. With reference to previous studies [ 34 , 45 ], education level was divided into six categories: “primary school and below”, “junior middle school”, “senior high school”, “associate degree”, “college graduate”, and “master and above”, which were assigned a score of 1–6, respectively. Occupation (reverse scoring) was divided into state and social managers, managers, private entrepreneurs, professional and technical personnel, office workers, individual industrial and commercial households, business and service employees, industrial workers, agricultural laborers, urban and rural unemployed, and semi-unemployed, which was based on cultural resources, economic resources, and organizational resources [ 46 , 47 ].…”