According to historical records, during the period of tripartite confrontation, in the 19th year of Jian'an, Cao Cao, the Prime Minister of the state of Wei, took over the power of the imperial government, and became increasingly powerful in the court. At that time, Liu Bei, the patriarchal clan of the Han Dynasty, had taken over the land of Hanzhong, with increasingly full wings. At the suggestion of Zhuge Kongming, the grand military division, he sent troops to the north to fight against Cao Cao of the state of Wei. The leaders are Zhang Fei and Ma Chao.
The two soldiers are divided into two routes. One route is Zhang Fei's army. After they arrived at Bashu City, they met with general Zhang Ying, the main force of Cao army. Zhang Ying is brave and resourceful. He can't get out of the city. After Zhang Fei could not attack for a long time, he sent people to stand in front of the city to shout and scold, with a loud voice. Zhang Ying didn't pay attention to it. He set up defense equipment on the city wall, such as challenge wood and gun stone chariot. He still insisted on not fighting. He ate, drank and enjoyed in the city. He was so angry that Zhang Fei blew his eyes, glared at his mouth, and his mouth became sore. All the soldiers were also thirsty because of the shouting in front of the city.
When Zhuge Liang knew this, he sent fifty jars of wine to Zhang Fei and taught him to do as planned. Zhang Fei ordered people to carry the wine to the front of the city, let the soldiers sit in front of the city, open the good wine and drink it happily, and he even lifted the wine jar and drank it up.
The spy in the city reported this to the police. Zhang Ying stood on the wall and looked at it. As expected, he said, "Zhang Fei is very deceiving." he ordered to go out of the city and rob the stronghold that night, and the army was defeated by Zhuge Liang's plan. Later, it was known that Zhang Fei's mission was to lure the enemy. What the soldiers drank during the day in front of the city was not "good wine and aging wine". Zhuge Liang sent someone to bring the soup that was helpful for the soldiers to reduce the fire and quench their thirst. This soup was made of light bamboo leaves. By this way, Zhang Ying was not deceived, but also helped the soldiers to solve the problem of heat and dryness. From then on, the light bamboo leaves have spread and spread to this day.
