战国时期，有一位名叫苏厉的谋士。
他听说秦国的大将军白起即将带兵攻打魏国的都城大梁，于是就去见周王。
"白起已经打败了韩、赵、魏等国家，并且还杀死了魏国的一位将领武，占领了很多土地。现在他又要去攻打大梁，如果大梁被攻下，那么我们周王室就会有危险。所以，君王您应该想个办法阻止他。"
于是，苏厉给周王出了个主意。
他建议周王派人去秦国，劝说白起不要出兵。
这个人到了秦国后，他就讲了一个故事。
这个故事是关于楚国有一个非常善于射箭的人，他的名字叫养由基。
有一次，养由基在离柳树一百步的地方射箭，他连续射了一百支箭，每支箭都能射中柳叶。
大家都觉得他的射箭技术非常好。
但是，有一个路过的人却说："你射得确实很好，但是我还可以教你更好的射箭方法。"
养由基听了很不服气，他说："大家都说我射箭好，你怎么能教我呢？如果你能教我，那你为什么不代替我射柳叶呢？"
那个人回答说："我不能教你射箭的技术，但是我看到你今天射了一百支箭，每一支都射中了柳叶，可是你没有休息，等一下你会感到疲倦，那时候你可能一箭也射不中了。这就叫做前功尽弃。"
现在，你已经打败了许多国家，取得了很多土地，你的功劳很大。
但是，如果你这一仗打输了，那么你的所有努力都会白费。
所以，你还是假装生病，不要出兵的好。
后来，人们就把这个故事中的"百发百中"变成了一句成语，用来形容射击技术高超，绝无虚发；或者形容料事、用计、施药等相当准确。
During the Warring States period, there was a strategist named Su Li.
He heard that Bai Qi, a great general of the Qin state, was about to lead his troops to attack the capital city of Wei state, so he went to see the King of Zhou.
"Bai Qi has already defeated the states of Han, Zhao, and Wei, and even killed Wu, a general of the Wei state, and occupied a lot of land. Now he is going to attack Daliang again. If Daliang falls, then our Zhou royal family will be in danger. So, Your Majesty should think of a way to stop him.".
So, Su Li gave the King of Zhou an idea.
He suggested that the King of Zhou send someone to the Qin state to persuade Bai Qi not to go to war.
After this person arrived in the Qin state, he told a story.
This story was about a man from Chu who was very good at archery. His name was Yang Youji.
Once, Yang Youji shot arrows at a willow tree from a hundred steps away. He shot one hundred arrows in a row, each hitting a willow leaf.
Everyone thought his archery skills were excellent.
But a passerby said: "You do shoot well, but I can teach you a better way to shoot arrows."
Yang Youji was very unconvinced when he heard this. He said: "Everyone says I'm good at shooting arrows, how can you teach me? If you can teach me, why don't you shoot the willow leaves for me instead?"
The man replied: "I can't teach you archery skills, but I saw you shoot one hundred arrows today, each hitting a willow leaf. But you didn't rest. Later, you may feel tired, and then you might not hit anything. This is called 'all previous efforts wasted.'".
Now, you have defeated many states and gained a lot of land. Your achievements are significant.
But if you lose this battle, all your hard work will be in vain.
So, it's best if you pretend to be sick and don't go to war.
Later, people turned the phrase 'hundred hits, hundred bulls' eyes' in this story into an idiom, describing either superb archery skills with no misses, or extremely accurate predictions, calculations, or medication.
