People look at U.S. billionaire investor Warren Buffett (not seen in the picture), chairman and CEO of Berkshire Hathaway, at an exhibition area before the Berkshire Hathaway's annual shareholders meeting in Omaha, Nebraska, the United States, on May 5, 2018. Berkshire Hathaway held its 2018 shareholders meeting on Saturday, attended by tens of thousands of people from all over the world. (Xinhua/Wang Ying)