Lu Ping looked curiously at the telescope in Qu Bing's hands and the weapons carried by the two personal guards beside him. They were all things Lu Ping had never seen before—and all of them had been made by the Han Tribe, which he had never visited.
"Compass."
Qu Bing used the telescope to survey the surroundings, then reached out for a compass. It was a small compass enclosed in an exquisite wooden case, only five centimeters in diameter. A round convex lens had been sealed over its center to magnify the markings on the compass and make them easier to observe.
Most importantly, one corner of the square wooden case held a crystal cap embedded in the wood. It contained water, with a bubble wobbling around inside. After taking it, Qu Bing carefully adjusted the bubble until it rested at the center of the circle at the top of the crystal cap, then began examining the compass needle.
"The things you use are all so unusual. I've seen a compass like this before—Chief Emissary You and the others have one too—but his is bigger than yours and doesn't have a case. What's this round thing on your compass? Why is there water inside it, and why isn't it full?" After watching for quite some time, Lu Ping finally couldn't hold back his question.
"Oh, this? It's the latest model of military compass. It's smaller and lighter, making it easier to carry, and it's more accurate too. This is a magnifying glass. It enlarges the compass markings for easier observation, and in an emergency, it can be removed and used to start a fire."
"The thing at the corner is a level, used to adjust the compass's horizontal position. Simply put, laying it flat gives a more accurate reading. Also,