There are several ginger duck restaurants in Zhangzhou, but the one you mentioned has the most varieties. There are dried ginger ducks and ginger duck soups, which taste really good.

I've eaten there several times.

Ginger Duck Restaurant is right at the place where we pass by every day when we go to work (Gantang Palace on Cangyuan Road) (next to Development Plaza). They do takeout, and they seem to have delivery.