Analyze the beauty of the bright moon in Qin dynasty and the customs in Han dynasty?

In the first sentence of the poem, the words "bright moon in Qin dynasty, amorous feelings in Han dynasty" show a magnificent picture: a bright moon shines on the border. The poet only used a lot of sketches without detailed description, but it just showed the vastness of the frontier and the depression of the scenery, rendering a lonely and desolate atmosphere. What is particularly wonderful is that the poet decorated the moon and customs with the words "Qin and Han Dynasties", which made this picture of the moon approaching customs become a painting in time and endowed Wan Li with a long sense of border history.