Diablo 3: upgrading of jeweler's training materials. According to relevant public information, jewelers can upgrade their level through props and gold coins provided by players. After upgrading, their appearance will change obviously, and more architectural formulas will appear at the same time. At the beginning of the game, you only need to pay gold coins to increase your craftsman's experience. Later, you need to find pages from monsters or bookshelves during the game, and every five pages will be combined into an upgraded book. Coupled with a certain fee, the experience of craftsmen can be improved. Experienced craftsmen are upgraded, and the whole appearance changes when the light flashes.