"Your Highness, what you want is a whistling arrow?"
In the forging room of the Huaxia Pavilion's Ten Nations Martial Arts Tournament branch, Shi Songtao listened to Zhou Shu's description.
"That's one way to describe it." Zhou Shu nodded. "Can you do it?"
"It's not a big problem." Shi Songtao nodded. "In the past, there were standard whistling arrows in the Great Xia army. When they were shot into the sky, they made a whistling sound."
"Standard whistling arrows won't work." Zhou Shu shook his head. "I've learned about Great Xia's standard bow and arrow. It can be shot at most three hundred paces ahead. The whistling arrow I want must be able to be shot at least one thousand paces away!
"Otherwise, they won't be of any use."
In the outside world, sentries could be set up at intervals.
In that case, ordinary whistling arrows were enough for use.