He was General Manager of Fuxing Flour Mill, one of the largest Chinese-owned factories in Beijing, on the eve of the city's takeover by the Communist forces during the Chinese Civil War.
[1] Sun was born in September 1921 in Heihe, Heilongjiang Province, but was a considered a native of his ancestral home Shaoxing, Zhejiang, by Chinese convention.
In December 1948, during the Chinese Civil War, he was appointed general manager of Fuxing Flour Mill (福兴面粉厂), then one of the largest Chinese-owned factories in Beijing, just before the city was taken by the Communist Party's People's Liberation Army.
[1] He made major donations to the People's Volunteer Army during the Korean War, and cooperated with the new Communist government in its campaign to nationalize China's private businesses.
In March 1993, he was elected Vice Chairman of the Eighth National Committee of the Chinese People's Political Consultative Conference (CPPCC).