| Field | Feature | Assignment |
| Nation | Han | Han = 1, others = 0 |
| Ethnic | Minority = 1, others = 0 | |
| Locality | Northeast | Northeast = 1, others = 0 |
| Northern Coast | Northern Coast = 1, others = 0 | |
| Eastern Coast | Eastern Coast = 1, others = 0 | |
| Southern Coast | Southern Coast = 1, others = 0 | |
| Middle reaches of Yellow River | Middle reaches of Yellow River = 1, others = 0 | |
| Middle reaches of Yangtze River | Middle reaches of Yangtze River = 1, others = 0 | |
| Southwest | Southwest = 1, others = 0 | |
| Northwest | Northwest = 1, others = 0 | |
| City | Metropolitan | Metropolitan = 1, others = 0 |
| Large city | Large city = 1, others = 0 | |
| Medium-sized city | Medium-sized city = 1, others = 0 | |
| Small city | Small city = 1, others = 0 | |
| Countryside | Countryside = 1, others = 0 | |
| Poverty-stricken countryside | Poverty-stricken countryside = 1, others = 0 | |
| Family | Insured residents on record | Insured residents on record = 1, others = 0 |
| Insured residents | Insured residents, others = 0 | |
| Divorced family | Divorced family = 1, others = 0 | |
| Laborers | The number of laborers | Range over positive integer |
| Elderly people | The number of the elderly people | Range over positive integer |
| Family background | The number of kids | Range over positive integer |
| The number of preschoolers | ||
| The number of kids in middle school | ||
| The number of members in High school | ||
| The number of members in University or college | ||
| The number of the salary family member | ||
| Others | ||
| Health | Personal condition in health | Fitness = 1, minor ailment = 2, critical illness = 3 |
| Health of parents | Healthy | Healthy = 1, others = 0 |
| Either seriously ill | Either seriously ill = 1, others = 0 | |
| Both seriously ill | Both seriously ill = 1, others = 0 | |
| Single family | Single family = 1, others = 0 |