Tā dài zhe fùzá xīnqíng cānjiā le qián nányǒu de hūnlǐ.
She attended her ex-boyfriend's wedding with complicated feelings.
Tips
usage
Word order is flexible: 复杂心情 (modifier + noun, 'complicated mood') vs. 心情复杂 (subject + adj, 'the mood is complicated'). Use the noun form in things like 带着复杂心情 ('with complicated feelings'); use the predicate form when describing how someone feels.
