The ruins of Langyin Tower are a small old-city historic stop in Cangzhou. The tower is associated with the Qing period and traditional local cultural life, and what survives now is more atmospheric fragment than major monument.
It is worth adding to a Cangzhou walk if you are already visiting the Confucian Temple, Grand Canal heritage sites or the Iron Lion. Treat it as a short context stop rather than a destination on its own.