A Hundred Shots, a Hundred Bull's-Eyes

Su Li, a counselor in politics and foreign affairs during the Warring States Period, heard that Bai Qi, the general of Qin State, planned to command troops to attack Daliang, the capital of Wei State. If Daliang were occupied by Bai, the imperial court of Western Zhou would be in danger. Thus, Su said to the King of Zhou,“In recent years, Bai Qi has defeated Han State, Zhao State and so on, and captured a large amount of land. Once Daliang were occupied, the imperial court of Western Zhou would be dangerous. Your Highness should stop Bai.”

So the King of Zhou sent Su Li to Qin State. Su Li said to Bai Qi,“Once upon a time, there was an expert archer in Chu State called Yang Youji. He could make every shot hit the center of each willow leave in a distance of a hundred paces from a willow tree. Everyone praised his marksmanship highly. But a passerby said that he could teach Yang how to shoot. Unpleasantly, Yang asked him to shoot the willow leaves. However the passerby explained.‘I can not teach you how to shoot, but I can tell you that though you make every shot hit the target, but you don't know how to have a good rest. Once you miss one shot, all your previous efforts are wasted.'”

“Now you have defeated Han State, Zhao State and so on, occupied a great amount of land and made great achievements. But if you could not win when attacking Daliang, all your previous efforts would be wasted, too. You'd better claim to your king that you can not lead troops to attack Wei State because of illness.”

But Bai Qi did not follow Su Li's words. He attacked Wei State, won the battle and captured dozens of cities.

This idiom means that every shot hits the target. It generally describes excellent marksmanship in shooting, and also indicates assurance and no wrong move.