1. Use black, white and gray to create an atmosphere at night. You can draw darkness on the canvas with a brush, and then draw the sky and stars with white and gray.
2. Use the change of brush strokes to create different textures. You can use thick brushstrokes to describe objects such as mountains and rivers and buildings, and use soft brushstrokes to describe illusory images such as starlight and moonlight.
3. Use geometric shapes and lines to express modernity. You can use lines such as straight lines and curves to create structures and buildings at night, and you can also use geometric shapes to represent objects such as stars and the moon.
4. Add text elements to the picture to highlight the theme of the work. You can use short words or sentences to express your understanding and imagination of the night and enhance the expressive force and appeal of the work.