What the Upgrade Panel Actually Does
Inside an upgrade-enabled fishing room — like Jili's Royal Fishing or CQ9's Cai Shen Fishing — the Weapon Upgrade Panel sits as a separate control strip below your cannon selector. You spend accumulated in-game credits to level your cannon up one tier at a time, raising its bullet cost but also its damage output against armoured fish and boss-tier sea creatures. Higher-tier
weapons unlock targeting modes that let you lock onto a single high-value target rather than spraying shots. The panel also shows your current upgrade tier, the cost to advance, and a preview of the next weapon's stats before you commit credits to the change.