The Xiangshan Commercial Culture Museum focuses on the trading networks and business culture that shaped the Zhongshan area when it was known as Xiangshan. It is a local-history museum, but the subject is broader than shop signs and ledgers: migration, overseas connections, and commerce all run through the story.
It is most rewarding if you already have some interest in the Pearl River Delta's merchant families and diaspora links. For a casual visitor, treat it as a short context stop rather than a headline attraction.