The Lin Zexu Memorial Museum honours the Fuzhou-born Qing official best known for his anti-opium campaign before the First Opium War. It is a compact but meaningful stop in the old centre, especially if you are tracing Fuzhou's role in late imperial and maritime history.
The museum fits easily with a walk around Sanfang Qixiang and nearby historic lanes. Come for context rather than spectacle: its value is in connecting a national historical figure to the city that shaped him.