ICA这样说http://www.ica.gov.sg/page.aspx?pageid=132#overseasbirth An overseas-born minor (child) may be eligible for Singapore Citizenship by Descent under Article 122(1) of the Constitution of the Republic of Singapore, if his/her parents meet any of the following conditions: Male Singapore citizen by Birth who has a lawful marriage at time of minor's birth Male Singapore citizen by Registration who has a lawful marriage at time of minor's birth and minor does not acquire citizenship of the country he was born by reason of his birth in that country Female Singapore citizen by Birth and minor born on or after 15 May 2004 Female Singapore citizen by Registration and minor born on or after 15 May 2004. Minor shall not acquire citizenship of the country he was born by reason of his birth in that country Male (who has a lawful marriage at time of minor's birth) or Female Singapore citizen by Descent has to　declare their residence period in Singapore. The application can only be accepted if the　parent fulfils th (more...)