These verses in Mulan's poems express the desolate night scene of the campsite and Mulan's yearning for her family when she is getting farther and farther away from home.

Say goodbye to your parents and stay by the Yellow River at dusk. I didn't hear my parents calling for a female voice, but I heard the Yellow River splashing. Say goodbye to the Yellow River and go to Montenegro at dusk. I didn't hear my parents calling for a female voice, but I heard Yanshan riding chirping.

I leave my parents in the morning and camp by the Yellow River at night. I can't hear my parents calling for my daughter, but I can only hear the sound of the Yellow River flowing. The next morning, I left the Yellow River for the road and arrived in Montenegro at night. I can't hear my parents calling for their daughters, but I can only hear the chirping of Hu Bing's war horses in Yanshan.

These eight sentences are repetitive, and duality includes duality, which is recited repeatedly. Write about the distance traveled, the speed of marching and the urgency of the military situation. The night view of the camp also set off Mulan's yearning for her family when she was getting farther and farther away from home.