Elementary

"This is for you." Old Ji took a black plastic bag out of his pocket. From the shape of the bag, he could guess that it was something like a notebook or a cell phone.

Gao Peng took it and opened it in front of Old Ji. The bag contained a beige map that felt coarse, though it was unclear what it was made of. There was also a tablet and a very precise compass.

"This tablet is solar powered. There's an electronic version of the map on it. You can also use it to make calls... if there's a signal. I'll teach you how to use the map and compass in the next few days. It's a map of the interior regions that shows the terrain of Yuzhou. It also shows where the dangerous places are. You should refer to it often.