What does it mean to sit awake in the middle of the night and sing the lonely song of frosty moon in a small cold day?

I can't sleep in the middle of the night, and the oil lamp is still on. I sat in my room reciting this winter.

"Sitting at midnight with a broken lamp, lonely singing about the frosty moon and a little cold day" comes from a seven-character quatrain "Sitting Alone on a Cold Night" written by Wu Yubi, a poet in the Ming Dynasty.

"Sitting alone in a cold night" Original: Sitting sleepless in the middle of the night, frosty and lonely. I was innocent when I was in a coma and sick. I sincerely asked the Compendium.

Wu Yubi was born in Chongren, Jiangxi Province in the Ming Dynasty. /kloc-at the age of 0/9, he was determined to specialize in Neo-Confucianism in Zhu Cheng and should not take the imperial examination. In the first year of Tianshun, Shi Heng recommended him, granted Zuo Yude, and refused to worship. Written by "Rilu", I learned about my life. Hu, Lou Liang and other disciples. Scholars call Mr. Kang Zhai, and he has Kang Zhai Ji.

Wu yubi