What does it mean to put an eagle at the end of a long song line?

It implies that they are together.

In the finale, the shots were given to Ashler Falcon and Li Changge respectively. Ashler Falcon has a very spiritual eagle, and the final shot shows the eagle standing on Asher Falcon's arm, looking very domineering.

Then Ashley Falcon flew the eagle into the sky, and kept staring at the direction where the eagle flew, but the eagle didn't fly very high, and the weather here was sunny and looked vast.

Then the camera turns to the scene where Li Changge is. At this time, Li Changge is looking up at the sky, which looks like the same scene as the place where Ashley Falcon is located. Similarly, the eagle flying past Li Changge is the one raised by Ashley Falcon.

Li Changge smiled when he saw the eagle fly by. He looked very happy.

This also proves that the ending of Hayabusa is not open. If the scene of two people getting married seems too deliberate, and the appearance of the eagle and the horizon look like dusk, it also means that Hayabusa is in the same place, and the distance is very close. Hayabusa only released the eagle to send a signal to Long song that it is time to go home for dinner.

Plot:

In the ninth year of Tang Wude, the imperial court changed, and Li Changge (Dilraba), the daughter of the former prince, escaped and went to Youzhou for help. On the way, Long song came across Ashle Falcon (Leo), a secret service of grassland tribe with a pseudonym of Qin Zhun. They were strangers, and they gradually felt like heroes cherish each other. Long song smashed a plot in Youzhou, at the same time, his identity was exposed and he went to Shuozhou to avoid disaster.

She hid beside Sun Heng, the prefect of Shuozhou, to help him resist the invasion of grassland forces, but she didn't expect the enemy general Falcon to be an old acquaintance of Qin Zhun. Long song was shocked and distressed, and he resisted falcon. However, the isolated city of Shuozhou fell after all, and Long song was willing to be taken to the grassland as a prisoner of war for the overall situation, only to learn unexpectedly that Great Khan had other ambitions.

Long song decided to set a personal vendetta for the time being, and risked his life to the death to break the game. Unexpectedly, he was trapped in a dead game. Hayabusa was willing to fight against Great Khan to save Long song, but they were far apart. Long song went into exile, and after experiencing the troubled times, she gradually understood the truth that benevolent people are invincible, and finally put aside personal grievances completely.

After discovering that the forces of the former Sui Dynasty were the behind-the-scenes troublemakers, Long song and Hayabusa joined hands to protect the peace between the Tang Dynasty and the grassland, and they finally recognized their feelings for each other and joined hands in the crisis.