1. What can be customized?

1. Function points, anything you don't like can be directly disabled
2. GUI interface, any buttons, any layout, anything you don't like can be changed
3. Language files, any reminders can be changed

2. Refreshed items don't match the configured quantity?

1. For example, if your daily shop is configured to refresh 20 items
2. Then if you have 20+ items for each rarity, there won't be any that don't refresh
3. If there aren't enough items, then of course they won't refresh

3. Adding items is too troublesome?

Existing command addAll can add one item to all rarities with one click

Differences in added items:

Will automatically discount prices according to the rarity discounts configured in config.yml