Lee Chang-Li Teng was a theoretical physicist who contributed to and designed many particle- accelerator-based projects around the globe passed away peacefully in hospice care on Friday morning 24th of June 2022. He was 95. He was born in Beijing, China on the 5th of September 1926. He is the beloved husband of Nancy Lai-Shen (nee Huang) since their marriage in Chicago on the 21st of September 1961. He is the loving father of Dr. Michael Teng, loving father-in-law of Kim (nee Tran) Teng, and the loving grandfather of Isabella Teng. He is the loving uncle, cousin, colleague and friend to many.