战国时期，齐国、楚国、韩国、赵国、燕国和魏国等许多国家联合起来对抗强大的秦国。
赵国派了一位名叫魏加的大臣去见楚国的丞相春申君。
魏加问春申君：“你已经选好带兵出征的大将军了吗？”
春申君回答说：“是的，我打算让临武君来担任这个职务。”
魏加想了想，然后说：“小时候，我很喜欢射箭。我可以用射箭的故事给你打个比方吗？”
春申君点点头，表示同意。
于是，魏加开始讲起了一个关于更羸和魏王的故事。
有一天，更羸和魏王站在高台上，抬头看见一群大雁在天空中飞翔。
更羸对魏王说：“我可以用弓箭把天上的大雁射下来，但我不需要真的放箭。”
魏王感到很惊讶，他说：“射箭的技术可以这么高超吗？”
更羸笑着回答：“当然可以。”
没过多久，有一群大雁从东方飞来。
更羸拉满弓弦，然后松开手。
结果，一只大雁应声掉落在地上。
魏王不解地问：“为什么没有放箭也能把大雁射下来呢？”
更羸解释说：“那只大雁受伤了。”
魏王又问：“你怎么知道它受伤了呢？”
更羸答道：“因为它飞得很慢，还发出悲伤的声音。飞得慢是因为它的旧伤还在痛，叫声悲切是因为它跟不上班里的其他大雁。由于它身上的旧伤还没有痊愈，心里又充满恐惧，所以当它听到弓弦的声音时，就惊慌失措地向上飞，导致旧伤破裂而掉落下来。”
最后，魏加对春申君说：“就像这只受过伤的大雁一样，临武君曾经被秦军打败过，他的心中充满了阴影。因此，他可能不是最适合去对抗秦军的大将人选。”
这就是“惊弓之鸟”这句成语的由来。
这个成语用来形容那些曾经受到过挫折或惊吓的人，他们在遇到事情时会感到非常不安。
During the Warring States period, many countries such as Qi, Chu, Han, Zhao, Yan, and Wei joined forces to fight against the powerful Qin state.
The Zhao state sent a minister named Wei Jia to meet with the prime minister of Chu, Chunshenjun.
Wei Jia asked Chunshenjun, "Have you already chosen a general to lead the troops into battle?"
Chunshenjun replied, "Yes, I plan to have Linwu Jun take on this responsibility."
Wei Jia thought for a moment and then said, "When I was young, I enjoyed archery. Can I use an archery story as an analogy?"
Chunshenjun nodded in agreement.
So Wei Jia began telling a story about Geng Lei and King Wei.
One day, Geng Lei and King Wei stood on a high platform and looked up to see a group of wild geese flying in the sky.
Geng Lei said to King Wei, "I can shoot down a wild goose in the sky with a bow and arrow, but I don't need to actually release the arrow."
King Wei felt surprised and said, "Can archery skills be so advanced?"
Geng Lei smiled and replied, "Of course they can."
Before long, a group of wild geese flew in from the east.
Geng Lei pulled back the bowstring and then let go.
As a result, a wild goose fell to the ground with a sound.
King Wei asked puzzledly, "Why could it be shot down without releasing the arrow?"
Geng Lei explained, "That wild goose was injured."
King Wei asked again, "How did you know it was injured?"
Geng Lei answered, "Because it was flying slowly and making sad sounds. It was flying slowly because its old injury was still painful, and it was calling out sadly because it couldn't keep up with the other wild geese in the flock. Because its old injury had not yet healed, and its heart was filled with fear, when it heard the sound of the bowstring, it panicked and flew upward, causing the old injury to rupture and fall to the ground."
Finally, Wei Jia said to Chunshenjun, "Just like this injured wild goose, Linwu Jun has been defeated by the Qin army before, and his heart is full of shadows. Therefore, he may not be the most suitable candidate to lead the troops against the Qin army."
This is how the idiom 'a startled bird' came about.
This idiom is used to describe those who have experienced setbacks or fright, and they will feel very uneasy when encountering things.
