Nu Er Qing, Maiden's Love is deeply symbolic and reflects the themes of love, devotion, and spiritual pursuit found in Journey to the West. Here's a simplified explanation of the song in the context of the story:

1. Love and Unity: The lyrics mention "pairs of mandarin ducks and butterflies flying together," which symbolize love and harmony. This could represent the strong bond between Tang Sanzang (the monk) and his disciples as they work together toward a shared goal.
2. Spiritual Over Material Goals: The song asks, "What is wealth and power?" It suggests that things like money and status are not important compared to spiritual growth and devotion. This fits the monk's journey, which is about seeking wisdom and enlightenment, not worldly success.
3. Commitment and Devotion: The repeated lines "Love, I wish for us to always be together in this life" reflect the loyalty and commitment of the characters on their journey. Despite all the dangers, the monk and his disciples stay united, focused on their mission.
4. Endless Journey: The final lines about always being together and staying loyal reflect the idea of spiritual unity and persistence. No matter how hard the journey gets, the monk and his disciples continue together, never losing sight of their higher purpose.

In short, the song reflects the love, devotion, and the rejection of materialism that guide the characters through their dangerous and spiritual journey to find the Buddhist scriptures.