1. Attention grabbing: Attractive headlines or phrases can be used to arouse the reader's interest, such as: "Breaking through the boundaries of the underground, opening up the wonders of the aboveground," or "The subway travels through the underground, bringing you to the wonderful landscape of the city. Provide convenient transportation services, you can describe the benefits of taking the subway in the copy, such as: "The subway travels through the city, connecting you to every corner you want to go, eliminating the trouble of traffic jams, saving time and energy".

3. Explore the city: The metro allows passengers to better understand and discover the city's flavor and features. You can emphasize the attractions and unique culture passing along the metro in the copy, for example: "Landmarks and places of interest along the way will show you the history and culture of the city, allowing you to experience the charm of the city in depth".

4. Safe and Reliable: Emphasize the safety and reliability of the metro in the copy, e.g. "The perfect facilities and strict safety measures of the metro system will guarantee your safety; the punctual operation and fast transfer will let you arrive at your destination on time".

5. Provide a comfortable experience: Describe the comfort and amenities of the subway cars, e.g., "Bright and spacious cars, air-conditioning system and comfortable seats allow you to enjoy a comfortable ride during your journey. Free Wi-Fi and charging outlets are also available in the car for you to work or rest."

In short, underground to above ground metro copy can combine passenger demand and metro features, show its attractiveness and advantages from multiple angles, and make readers interested in and feel good about taking the metro.