Urgent! ! ! ~ ~ ~ ~ Which line in Mulan's poems uses duality, which is about wonders?

Is the landlord asking about intertextuality? Intertextuality is as follows:

1. Buy war horses in the east, saddles in the west, reins in the south and whips in the north.

2. The general died in hundreds of battles, and the strong man returned in ten years.

When the window is in the clouds, the mirror is yellow.

4. Open my East Pavilion door and sit on my West Pavilion bed.