The second child in the family had a birth certificate at first, but he couldn't get the hukou and ID card. Now he wants to emigrate. what should he do ？

If you immigrate, your parents and your brother will make a report on DNA paternity, and then go through the formalities in the relevant departments. Kindly remind that DNA paternity must go to a qualified judicial authentication institution. For example, Guangdong Huasheng Judicial Appraisal Center in Guangzhou, whose appraisal opinions are internationally recognized. The corresponding forensic identification in DNA paternity is "Forensic Material Evidence". The appraisal opinions of institutions with CNAS certificates are internationally recognized. Attach relevant qualification certificates for reference.