大湄公河次区域经济合作 大湄公河次区域经济合作第三次领导人会议举行，六国领导人在老挝首都万象签署了《领导人宣言》。[http:--news.xinhuanet.com-newscenter-2008-03-31-content_7893324.htm 新华网]url=http:--news.xinhuanet.com-newscenter-2008-03-31-content_7893324.htm [http:--news.bbc.co.uk-chinese-simp-hi-newsid_7320000-newsid_7322600-7322653.stm BBC中文网]url=http:--news.bbc.co.uk-chinese-simp-hi-newsid_7320000-newsid_7322600-7322653.stm