请将以下段落翻译为中文，并保持原文句式结构尽量不变: 
Born in Los Angeles in 1950, John Smith Jr. grew up in a middle-class family, attending local schools until he graduated from UCLA in 1972 with a degree in economics. Following graduation, he worked as a financial analyst for several companies, gaining experience in corporate finance before starting his own firm, JS Investments, in 1985.
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1950年出生于洛杉矶，小约翰·史密斯在小康家庭中长大，自当地学校毕业，并于1972年获得加州大学洛杉矶分校经济学学位。毕业后，他曾先后在多家公司担任财务分析师，积累了丰富的企业融资经验，并于1985年创办了自己的公司——JS投资公司。
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