Introduction to props upgrade methods:
Special props that need to be upgraded.
1. Hammers, axes, shovels and weeders can be upgraded according to star rating requirements. In the later stage, the Mystery Cave requires special props with 4 stars or above;
2. It is only recommended to upgrade the caravan once, because it is enough to arrange two groups of people for the battle;
3. Level unlock props can only be upgraded to level 3 during the first week of the game;
4. Just upgrade the cooking pot and collection basket to level 2;
5. There is no need to upgrade hammocks, fishing rods, insect nets and water bottles.