Hancheng Sun was born on May 29, 1933 at Su Zhou, Jiangsu Province, P. R. China. He had great love reading books and exploring universe. His passion to nature, science and life defines who he was and what he did. Not only being a loving father, Hancheng, had always been a very generous, gentle hearted, selfless person to all around him. Though extremely intelligent and smart, what made him where he was at, with great accomplishment with his career being a nuclear physicist, concentrating on applied physics, was his positive attitude, persistence and dedication to his work and research.
For the past two years, due to stroke complication, which triggered dementia and Parkinson, yet Hancheng was able to manage the situation to minimize impact on those who looked after him, including care giver and his beloved daughter and son-in-law. What kind of remarkable wisdom he must had to make him quickly adapted to the situation to make looking after him extremely easy. Never a single whine, nor anger, nor feeling down. Hancheng passed away peacefully on July 1st, 2020, shortly after 5AM PST at Los Robles Hospital, CA, United State, at age 87.