What do the family types mean in China?

Nuclear Family (核心家庭): Couple with or without children: a family unit consisting of a married couple with or without their unmarried children.

Stem Family (直系家庭): Couple with one married child and grand children: a family structure in which one married child remains in the parental home with his/her spouse and children.

Joint Family (复合家庭): Couple with two or more married children: a family structure in which several generations of a family, including grandparents, parents, children, live together under one roof or in close proximity to each other.

Other Family (其他家庭): a family structure in which unmarried siblings live together.

Nonfamily Households (单人户): Women/men living alone.