"The sound of the piano is moist after the rain, and the wind is fragrant with calligraphy" means that the sound of the piano is more pleasant after the rain; The breeze blows, and the newly written calligraphy works exude a refreshing fragrance in the breeze.

This sentence is a couplet on the column of the west wing of Lushan Bailudong Academy.

From the common sense, musical instruments (especially China's silk stringed instruments) are too dry and their voices are hoarse. Playing in a certain humidity makes the sound of the instrument better. And our good ink in China is mostly mixed with aromatic substances such as borneol. When the wind blows, the ink seems to be stronger, unlike before.

Extended data:

Bailudong College:

Located at the southern foot of Wulao Peak in Lushan Mountain, Jiujiang City, Jiangxi Province, it is a world cultural landscape, enjoying the reputation of "the first academy in China" and being rated as "the first of the four major academies in China".

Founded in the first year of Southern Tang Dynasty (AD 940), it is the first complete academy in China. "Lushan Sinology" (also known as "Bailuyuan Sinology") was established in the Southern Tang Dynasty, and it is the only sinology established by the central government outside the capital of China.

When Zhu, a Neo-Confucianism scholar in the Song Dynasty, became Kang Jun of Zhinan (now Lushan City, Jiujiang City, Jiangxi Province), he rebuilt the academy and gave lectures in person, and determined the rules and objectives of running the academy, which made him famous. It became an important cultural cradle in China from the end of Song Dynasty to the beginning of Qing Dynasty and one of the important birthplaces of education and culture in China.