Two days passed,but still Chu-ke Liang waited.In the early morning of the third day,Chu-ke Liang invited Lu Su to ride in a boat with him.Chu-ke Liang ordered the soldiers to connect the 20 boats with rope,and then they sailed toward the north bank of the Yangtze River.It was so foggy on the river the soldiers could hardly see each other,even standing face to face.