Why do primary schools count relatives as overseas Chinese?

This kind of statistics is to count the population structure of our country.

Overseas Chinese: China people who have obtained residence permits abroad and have lived, worked and lived abroad for a long time, and their children are their children. The purpose of statistics of relatives of overseas Chinese in primary schools is to grasp the distribution of overseas Chinese and their relatives, increase services for overseas Chinese, and count the population structure of China.

In primary school and junior high school, the main target of overseas Chinese education policy is overseas Chinese children, and their identities include both overseas Chinese and foreign Chinese.