"Ah? Lord Priest, these are igniting fire arrows (hiya). Some use expensive gunpowder, and some use cheap sulfur... Hmm, the Tiantai Sect is truly affluent! These whistling fire arrows, they all use gunpowder, I reckon each arrow costs dozens of cash!"
"Hong! I'm asking you, in your country, do you actually have gunpowder?..."
"Uh?! This question... Lord Priest, gunpowder has been in use in Tang Land and Korea for hundreds of years. During the Yuan Invasion, there were those booming stone-shooting cannons... Japan of course learned from Tang Land, so naturally, there is gunpowder. However, natural saltpeter is scarce, only produced in the mountains of Kyushu, and in the Kansai region of Honshu. It's said there's a method of artificial saltpeter making, but not many Martial Families know of it; I've only heard rumors..."
"What?! Are you saying that the Great Ming Alliance in the west has been using Divine Revelation gunpowder for hundreds of years?"
