Zunyi Art Museum gives the city a cultural stop that is not only about the famous 1935 conference. Exhibitions can vary, but the museum's value is in showing local and regional art practice in a city more often visited for political history.
It is a good add-on rather than a sole reason to cross town. Pair it with Zunyi's better-known historical sites if you want a fuller day that balances ideology, architecture, and contemporary culture.