Leaders fromboth China and Vietnamhave reached agreements on building“Two Corridors and One Ring”,in which“the Economic Corridor fromNanning of China to Lang Son,Hanoi,Haiphong and Quang Ninh of Vietnam”is one of them.The paper mainly analyzes its favorable conditions,content and significance,suggesting that China and Vietnam cooperate in building projects of top priority and then extend their scope.The paper also suggests ways on howgovernments,research and eˉducational institutions guarantee the successful construction of the corridor.