For the past day in RT, which was equivalent to two days in the game, Sato and his crew operated close to the constraints of the unnamed distributary. While the others were fighting monsters, Sato was busy creating new equipment to be sold later on.
Xue Yan, who also had a similar issue like Sato regarding the monsters here, also took to making runes. The past few weeks were enough for her to attain the official rank for her subclass hence she was capable of acquiring experience points from simply practicing her craft. Also, unlike blacksmithing, Xue Yan didn't need a lot of equipment to go about making runes. All she needed was the required materials, a scripting pen and a flat surface to work on which wasn't hard to find.
A day might seem small to people but in IR, it as the equivalent of two days and players could achieve a lot more here. The time period was enough for both Sato and Xue Yan to create more than two new batches of equipment and runes.