Zhang Feng, 47, made his money in fuel distribution in Shanghai and decided he didn't want to spend the rest of his life in the business.

FORBES

Prof Zhang and Prof Zhu Feng at Peking University also tell the newspaper that the crisis is an opportunity for China and the US to co-operate more closely.

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Mr. Zhang said he hadn't been allowed to see Ms. Feng in the hospital and was unable to reach her or her husband by phone on Friday.

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