With what little there is to go on, and the consideration of a player wanting to play chinese. I propose;
Coastal Defender:This unit has +1 anti air attack dice if it adjacent to a coast or island sector.
Gunboat: Once per game, if a friendly auxiliary is local or adjacent. This unit may reroll a main gunnery attack.
Coastal defender is for her going down while being an escort of lutzon. But it double duties for her being sunk in chinese service. Gunboat is doubling down on that escort role, but is recognition of what a proxied chinese fleet will be relying on.
CONVOY DEFENDER: While a friendly Auxilliary is in this unit's sector or an adjacent sector, this unit rolls one extra attack die when making Main Gunnery attacks this turn.
And add
GUARD SHIP: This unit may deploy in any sector adjacent to a coast or island on your side of the map. If deployed this way, this unit can't move until it has been attacked.
Slow 2 CONVOY DEFENDER: While a friendly Auxilliary is in this unit's sector or an adjacent sector, this unit rolls one extra attack die when making Main Gunnery attacks this turn.
GUARD SHIP: This unit may deploy in any sector adjacent to a coast or island on your side of the map. If deployed this way, this unit can't move until it has been attacked.
Slow 2 CONVOY DEFENDER: While a friendly Auxilliary is in this unit's sector or an adjacent sector, this unit rolls one extra attack die when making Main Gunnery attacks this turn.
GUARD SHIP: This unit may deploy in any sector adjacent to a coast or island on your side of the map. If deployed this way, this unit can't move until it has been attacked.