Generate a Before / After comparison chart for usage scenarios. The picture uses a left-right column layout, with Before on the left and After on the right. Focus on showing the state changes of the same subject before and after using the product in real usage scenarios, rather than separately presenting the comparison of the product itself. The "Before" side should represent the state before use, such as untreated, uncleaned, unimproved, problematic, or in a normal state; The side after should show the state after use, such as after cleaning, after improvement, becoming cleaner, fresher, more comfortable, or in a more ideal state. It is required that Before and After maintain the same person / same object / same scene logic / similar perspective / similar composition, making the changes before and after clear and intuitive. The picture should clearly convey the sense of a scenario of "using the product" or "after using the product", such as a person holding the product, operating it, in front of a sink, in front of a mirror, in front of a desk, in a bathroom, in a home environment, etc. The product can naturally appear in the hands of characters, on the tabletop, or in the scene as supplementary information, but it should not be the main focus, and it should not be presented as a simple comparison of product bottle images. Clear "Before" and "After" labels, as well as concise arrows or dividers, can be added to enhance the contrast between before and after. The overall style should be realistic, monetized, and easy to understand, similar to the usage effect comparison charts in e-commerce advertisements or social media promotions. Ultimately, the key is to highlight the changes in usage effectiveness rather than the still display of the product.