What should I do if my mother is a Mexican-born child of China nationality and wants to return to China to settle down?

According to Article 5 of China's Nationality Law, a child born abroad has at least one parent who is a China citizen, while the parents of a China citizen have not "settled in a foreign country", and the child automatically has China nationality at birth, even if he has other nationalities at birth.

So when the child is born, does the mother "settle in a foreign country" (the China Embassy understands that "settling in a foreign country" means having the right of permanent residence in a foreign country)? Where's father?

If the parents of China citizens have no right of abode in foreign countries when the child is born, and the child has China nationality, they should use China passport or China travel permit to return to China. You can register when you return to China. Mexican birth certificate that may require consular certification.