What is the meaning of "cha cha dance" in "Jiao Ying Cha Cha Dance"?

Yes, it is to describe the cry of orioles.

"Chen Wenjing" is an onomatopoeic word, which describes the voice of Jiao Ying and gives people an immersive auditory image.

Looking for flowers by the river. Sixth Du Fu? the Tang Dynasty

Four yellow maiden flowers thrive on the road covered, and thousands of flowers bow and the branches are low.

The roadside around Huang Si's maiden is full of flowers, and thousands of flowers are pressing the branches.

The butterflies in the flowers are dancing, and the soft yinger in freedom is just singing happily.

Butterflies don't want to hover in the flowers, and free little orioles keep singing in the flowers.