It was an exterior shot in Salzburg, a mountain town in the Alps in western Austria. It is the second largest city in Austria and the hometown of Mozart. On the outskirts of Salzburg, there is Lake Wolfgang with blue to transparent water.

There is a hill in the center of Salzburg, and on the top of the hill, there is a pure white castle. Although there is a cable car leading to the top of the mountain, I always felt that it was a waste of money, so I slowly climbed up the mountain.

The castle is now one of Salzburg's landmark buildings, and its history can be traced back to the 7th century AD. The castle itself is the best place to overlook the stunning scenery of Salzburg. The city's classical huts stretch along the river, truly picturesque. Along the winding mountain road to the ancient fortress, the entire castle has been immersed in the twilight, the cool breeze is blowing, the moon rises above the spire of the ancient castle, and the stars hang down like the clothes of the night. Without the crowds during the day, the castle suddenly looks better. The house is much more spacious and cleaner. There were three or two strangers like me sitting on the ancient wall, playing nice guitars and singing songs from the past. The moonlight casts the figures of the singer and the listener on the vicissitudes of the castle walls behind them, forming a wonderful silhouette.