How did the illegitimate children of Taiwan Province people in Chinese mainland settle in Taiwan Province Province?

Since it is an illegitimate child, it is an illegitimate child. The biological father went through the adoption formalities in the mainland court and made DNA kinship. After SEF certification, she went back to the Taiwan Province Provincial Court to apply for adoption, applied for children to enter Taiwan, and then went to the hospital designated by the Taiwan Province Provincial Immigration Department for DNA kinship identification. If it can, the court will approve it.