During the Three Kingdoms period, Cao Cao marched for a long time and the soldiers were very thirsty. Cao Cao said: "There is a large piece of Meilin in front, bearing many plums, which are sweet and sour and can quench your thirst." When the soldiers heard this, their mouths watered and they were not thirsty for a while. Metaphor can't be realized, so we have to use fantasy to comfort.

Step 2 take care of thatched cottages

At the end of the Han Dynasty, Liu Bei went to Zhuge Liang's hut three times and asked him to come out to help him conquer the world. Finally, Zhuge Liang agreed to come out. The latter metaphor refers to repeated sincere invitations.

3. Ready for battle

During the Chu-Han War, Xiang Yu's army was stationed in Gaixia, and the serenade ran out of food. He was surrounded by the Han army and the vassal army. At night, he heard the Han army singing songs in all directions. Xiang Yu was surprised and said, "Did the Han army occupy Chu?" Why are there so many Chu people? "Metaphor is besieged on all sides, in an isolated and critical predicament.