Under what circumstances did Ganlong write Lugou Xiaoyue?

Lugou Xiaoyue is the moon at dawn of Lugou Bridge and one of the eight scenic spots in Yanjing.

Emperor Qianlong's poem "Lugou Xiaoyue";

The river bridge is full of dusk,

Take a look at the wild water yellow in Lugou.

When the trees enter the flat suburbs,

The sky breaks the moon and hides.

Judging from the scenery described in the poem, it should be the excitement and relaxed mood expressed by Qianlong when he enjoyed the scenery.

Lugou Bridge was built during the reign of King Dading (1 189).

This 1 1 span multi-arch stone bridge has been preserved to this day. The bridge is 266.5 meters long and the deck is 7.5 meters wide. The bridge deck is divided into three layers: bridge deck stone, bridge deck stone and bridge deck stone. There are 279 stone railings, 279 fence boards and 280 sentries. Each railing is a watchtower, with a lotus pedestal carved on the stigma, a lotus pier carved under the pedestal and a lion carved on the top of the column. The image of the stone lion is lively. ***485, sitting and lying ups and downs, changing a lot, rubbing his chest and looking up, looking up at the sky, staring at the bridge deck, turning sideways, looking at each other, raising a lion and calling softly. These lions are divided into male and female lions. The female plays with the little lion and the male plays with the hydrangea. The big lion is crawling with the little lion. ...

There are four stone tablets on both sides of the entrance of Lugou Bridge. At both ends of the bridge deck and the bridge head, there are four monuments, one is the monument of Emperor Kangxi repairing Lugou Bridge, and the other is the monument of Emperor Qianlong repairing Lugou Bridge. "Lugou Xiaoyue" Monument and the Monument Pavilion where Qianlong inscribed Yongding River poems.

During the Han and Tang Dynasties, people left Chang 'an, the capital of China, and those who saw them off were sent to Baqiao to fold willows to see them off. Jin, Yuan, Ming and Qing all took Beijing as their capital. When they left the city, they all went to Lugou Bridge and stayed for one night. Then they went to the bridge the next morning, so there was Lugou Xiaoyue, one of the eight scenic spots in Yanjing. In the first quarter of the moon, on the edge of the western hills, covered with black, turbulent river rushed out of the canyon, like a snake winding, running eastward under the bridge. In the past, business travelers, literati, officials who were promoted or demoted, or sentimental about mountains and rivers, or lamenting that life is short, or lamenting the hardships of the journey, or leaving pen and ink or poetry, have formed Lugou cultural phenomenon. There are hundreds of poems with Lugou Bridge as the background, among which Liu Zao's Crossing the Sanggan River in the Tang Dynasty is the most famous:

It has been frosted ten times in Bingzhou Guest House.

Remember Xianyang day and night.

Change dry mulberry water for no reason,

But I hope Bing is my hometown.

In addition, there are poems by Su Zhe, a poet in the Northern Song Dynasty, crossing the Sanggan River in the North (Yongding River was called Sanggan River in ancient times), Lugou by Zhao, a writer in the Jin Dynasty, crossing the Sanggan River by Fan Chengda, a poet in the Southern Song Dynasty, a poem by Zhang Ye, a writer, a poem by crossing the Lugou Bridge and a poet and painter. During the Yongle period of the Ming Dynasty, Hu Guang wrote 124 poems "Eight Scenes of Yanshan Mountain". Chayong Dinghe written by Kangxi in Qing Dynasty, a poem tablet written by Qianlong in Lugou Xiaoyue, and several poems in Qing Dynasty.