It refers to sitting under the moonlight accompanied by a beautiful woman, playing the piano with the spring breeze.
Original sentence:
The green gauze is waiting for the moon and the spring tunes, and the red sleeves are fragrant for reading at night.
Translation:
Accompanied by a beautiful woman, he sat under the moonlight and played the piano. At night, he lit candles and read with him.
This is a couplet adapted from a poem by Xi Peilan, a female poet from the Qing Dynasty.
Extended information:
It is adapted from this:
Green clothes hold inkstones to answer questions, red sleeves add fragrance to accompany reading.
The author Xi Peilan is a female poet in the Qing Dynasty and a female disciple of Yuan Mei. The name Ruizhu, whose courtesy name is Yunfen and Yihua, whose names are Huanyun, Daohua, Peilan, etc., was from Zhaowen (now Changshu, Jiangsu Province). Sun Yuanxiang's wife in Changshu. Peilan is good at painting orchids. The poems are clear and wonderful, and he is the author of "Changzhen Pavilion Poetry Manuscript" and "Bangxinglou Tiaoqincao".
Reference source: Baidu Encyclopedia-Xi Peilan