No.1 Chen-Ning Yang & Weng Fan

Chen-Ning Franklin Yang, born on October 1, 1922, is a Chinese-born American physicist who works on statistical mechanics and particle physics. He and Tsung-dao Lee received the 1957 Nobel Prize in physics for their work on parity nonconservation of weak interaction.

Weng Fan, born in 1976, is a master in translation from the Guangdong University of Foreign Studies

Yang, then aged 82, married Weng, who was 28, in December 2004.

Age gap: 54 years