After Chapter 10, all weapons can be upgraded to Level 2. Note: A blue store can only upgrade weapons once.
If the dragon sword and the dragon tiger chop don't rise from beginning to end, all weapons will be at full level (the dragon sword will automatically become true in chapter 14, and the dragon sword and the dragon tiger chop will automatically become dragon sword and Baal sword in chapter 17).
You can't upgrade the bonzi at the beginning of level 3, because the bonzi has reached level 2. You can upgrade to level 2 after 10.
If the landlord has any questions, please come to A9VG for discussion.