Original title: Gates surpasses Bezos and becomes the richest American media in the world again: this may play a key role.

Bill Gates, co-founder of Microsoft Corp Company, replaced Jeff Bezos of Amazon.Com Inc Company as the richest man in the world on the 15th, US media reported. This is the first time in more than two years that Gates has regained the top of the rich list.

Gates' reclaim as the richest man may be due in part to an unexpected decision announced by the Pentagon on Oct. 25, according to the website of Fortune Magazine. that is to choose to sign a $10 billion cloud computing contract with Microsoft Corp rather than Amazon.Com Inc. Microsoft Corp's share price rose 3%, bringing Gates' fortune to $110 billion, according to the Bloomberg billionaire index. Since the announcement, Amazon.Com Inc's share price has fallen about 2%, and Bezos has a net worth of $108.7 billion.

Mr Gates, 64, briefly surpassed Mr Bezos, 55, in a day last month after Amazon.Com Inc recorded its first profit decline in two years, but the share price of the world's largest online retailer subsequently narrowed its decline. The Bloomberg Billionaires Index, which tracks the wealth of the 500 richest people, updates each trading day after the U.S. stock market closes. Bernard Arnault, Europe's richest man, ranked third with a fortune of $102.7 billion.

Microsoft Corp's share price has risen 48% this year, and Gates'1% stake has risen sharply, according to the Fortune magazine website. The rest of Gates' wealth comes from years of stock sales and investments at Cascade Investments, his family's office.

If he had not divorced Mackenzie, Bezos would have been much richer. The two announced their breakup in January, and Mackenzie, 49, received a stake in Amazon.Com Inc in July. Mackenzie's net worth fell to $35 billion on the 15th. Besides, Gates might never have relinquished his position as the richest man had it not been for charity. Since 1994, Gates has donated more than $35 billion to the Bill and Melinda Gates Foundation.

Gates recently shared his views on the property tax proposed by some Democratic presidential candidates, such as Elizabeth Warren. Gates said he had paid more than $10 billion in taxes.

"if I have to pay $20 billion, that's fine," Gates said. But if you say I have to pay $100 billion, I'll have to start figuring out how much money I have left. "

On November 13, Bill Gates, co-chairman of the Bill and Melinda Gates Foundation, was interviewed by Xinhua News Agency in Seattle, USA. (Xinhua News Agency)