>Autumn wind cool, while sweet-scented osmanthus >fragrant, China is flooded with moon cakes. >Awakening! Autumn Festival is forthcoming once again!
I think your paragraph is refinedly-written. Anyway I will try my best to help you.
Maybe I don't know about grammar. But why is it possible to have no "verb", and only form as part of a statement for the following:
- Autumn wind cool, while sweet-scented osmanthus fragrant
You may consider to delete "once" at the last statement. Meaning is slightly changed, but the statement become a bit concise.