The "Belt And Road" international cooperation summit BBS opens at the national convention center in Beijing on May 14.President xi jinping attended and delivered a keynote speech.Twenty-nine foreign heads of state, heads of government and heads of major international organizations, including the secretary-general of the United Nations, have traveled overseas to attend the leaders' roundtable summit and other activities.About 1,500 dignitaries from more than 130 countries attended as official delegates,…