The origin of looking at plum to quench thirst
Seeing plum blossoms quench one's thirst comes from Liu Yiqing's Hypothetical World in the Southern Song Dynasty: "Wei Wu lost his way in the battle, and the whole army was thirsty, so he said,' Once upon a time, there was a great merlin, who forgave his son, and sweet and sour could quench his thirst.' When the foot soldiers smell it, they can get the source with their mouths full of water. "Looking at plums to quench thirst" means sour plums. People drool and quench their thirst when they want to eat plums. Looking at plums to quench one's thirst, later it was a metaphor to comfort oneself with fantasy.
The truth of looking at plums to quench thirst
This story tells us that we should motivate ourselves with the desire for success, so that when we encounter difficulties, we can summon up the courage to overcome them, leave the predicament and move towards success.