Yang Chen-ning, the renowned physicist, speaks at a seminar held by Tsinghua University to mark his 100th birthday in Beijing on Wednesday. Photo: Courtesy of Tsinghua University

Yang greets visitors at an exhibition in Shanghai in August 2019. Photo: The Paper

Yang delivers a speech at Nankai University in North China’s Tianjin in September 2007. Photo: VCG

Yang (right second in front row) is awarded an honorary doctorate with noted physicists Tsung-Dao Lee (right first in front row) and Wu Chien-Shiung (left second in front row) from Princeton University in the U.S. in 1958. Photo: Shanghai Pictorial/IC Photo

Lee and Yang (from left), who won the Nobel Prize in Physics together in 1957, at Princeton University in the U.S. in 1961. Photo: VCG

Richard Feynman, a Nobel Prize-winning physicist famous for the new theory of quantum electrodynamics, collaborates with Yang in a classroom at the University of Chicago, U.S., in 1957. Photo: VCG

Yang, 27, poses for a portrait in front of the School of Physics at the University of Chicago in 1949. Photo: VCG

Yang takes a photo with his brother Yang Chen-ping (right) and his friend Deng Jiaxian (center), a nuclear physicist and the founder of China’s nuclear weapon, in Chicago, U.S., in 1947. Yang went to the U.S. to study physics in 1945. Photo: VCG

Admission tickets Yang used for bachelor admissions test in 1938 (left) and graduate admissions test in 1943. Photo: VCG & IC Photo

Yang (front) sits with his siblings on the floor in 1935. Photo: VCG

A portrait of Yang and his parents that was taken in 1923, when he was only 10-month-old. The physicist was born in 1922 in Hefei, East China’s Anhui province. Photo: VCG

Students from Tsinghua University Primary School send wishes to Yang at the seminar held to celebrate his 100th birthday in Tsinghua on Wednesday. Photo: Courtesy of Tsinghua University

Yang talks to a guest at a ceremony for the award of the Shaw Prize, which was established in Nov. 2002 to honor individuals with distinguished achievements in their fields in Hong Kong in 2007. Yang is one of the founders of the prize's council. Photo: VCG

Yang chats with Chiang Pin-kung, former chairman of the Straits Exchange Foundation who passed away in 2018, at a forum in Hong Kong in 2008. Photo: VCG

Yang introduces Albert Einstein at a seminar in September 2019 in Beijing. Yang became a colleague of Einstein during the time he pursued a postgraduate degree at Princeton University in the U.S. Photo: VCG

Yang talks to his second wife, Weng Fan, in the auditorium of Tsinghua University in 2012. He returned to China and started to teach in Tsinghua in 2003. Photo: VCG