镇江三怪 (Zhen jiang san guai) - The three bizarre/peculiar foods of Zhenjiang
3. 镇江香醋 (Zhen jiang xiang cu) - The vinegar (醋) made in Zhen jiang is known for being extra fresh/flavorful or keeping longer, or something like that. 肴肉 is commonly dipped in the 醋 and eaten. The vinegar in the above picture is in the small bowl slightly off center to the left.
In fact, this last picture shows all 3 weird foods of Zhen jiang!