My brother's daughter is called niece. Niece refers to a person with the same surname as himself, who is my brother, the daughter of my brother's family, or the daughter of my cousin's family. It can also be called niece. The niece refers to her sister or her child, who does not have the same surname as herself. For example, her sister's daughter must not have the same surname as herself, so this is her niece.
Each nation of mankind has a kinship appellation system to express the relationship of family members. Kinship appellation refers to the name that determines the relationship between family members and themselves centered on themselves. It is the name and method of mutual appellation between relatives based on blood relatives and in laws. It is a sign of determining the relationship between relatives and myself.
The kinship of the Han nationality is well-organized and orderly: the older generation has aunts, uncles and uncles, the same generation has sisters and brothers, and the next generation has nephews and nephews. The kinship of Chinese people due to in laws is quite complicated. The various appellations derived from it are also a major feature of Chinese culture.