Blue air or wind means cloudy when bamboo is near water.

The blue air or wind when the bamboo near the water is cloudy is a clever description of the elegance of blue and the strength of bamboo, and a metaphor for a person's noble quality. Blue sky bamboo shadow is from calligrapher Wang Wenzhi, born and died from 1730 to 1802. His name is Qing Yu, whose real name is Meng Lou, and he is from Dantu, Jiangsu (now Zhenjiang, Jiangsu). Officials, poets and calligraphers in the Qing Dynasty.