What are the non-traditional families?

Since ancient times, China has advocated the traditional nuclear family model of "family happiness" (a traditional family usually has a father, a mother and at least two children), which is closely related to our cultural tradition. But in recent years, with the entry of western culture, especially under the influence of "returnees", many people's values have changed, so a large number of single families and dink families have emerged, which is the concept of non-traditional families.