If a baby is born in China, the baby can be of Chinese nationality. Parents have the right to decide the nationality of their baby, but they cannot have dual nationalities at the same time. If the parents have obtained permanent residency in other countries, their child cannot have Chinese nationality.
Even if the baby was born in China, the baby must adopt the nationality of the father or mother and cannot apply for Chinese nationality.
If the nationality of the parents is unknown but they live in China. If the baby was born in China, the baby can obtain Chinese nationality.
Therefore, although Gu Ailing was born in America and her father is an American, her mother is of Chinese nationality and has not yet obtained permanent residency in the US, so she’s able to obtain Chinese nationality.

