The Ruili River, 100 to 200 meters wide and two to three meters deep, cut across their path. If they were to cross the river by boat, they would easily become the targets of enemy fire.
由於途中橫著一條寬一、二百公尺、深二、三公尺的瑞麗江，如果部隊搭小艇過江，很容易成為敵人射擊的目標。