That's pretty difficult. Is there any answer provided that could be true?
They express emotions through facial gestures.
In the absence of the accompanying image, I'd guess it involves a significant presence of red hues. A basic explanation is that red represents luck and prosperity in Chinese culture, a fact prominently displayed during various Chinese celebrations, notably the Lunar New Year.
In the U.S., white conveys purity and longevity with deeper historical roots, as it signified wealth due to the challenge of maintaining clean white garments, making them exclusive to the affluent.
In a similar vein, clothing in red (and yellow) was historically worn by Chinese Emperors, leading to its contemporary association with privilege and affluence.
