China is the smallest country. What rhetorical devices are used?

Home is the smallest country, which means comparing the family to the smallest country, that is, treating the family as the smallest country. Home is the smallest country. In fact, you can also compare it like this. After all, a family is composed of several family members. Tens of millions of state-owned families refer to the behavior that tens of millions of families form a country, that is to say, a country contains the meaning of tens of millions of families in Qian Qian.

Home is the smallest country, and there are ten million people in the country. This means that Qian Qian is a big family composed of thousands of small families.