During the late Tang Dynasty, the three northern territories of Wei, Zhen, and Yan were vast and militarily strong. Their military governors, though nominally appointed by the emperor, were effectively independent of central control. Luo Wei, the military governor of Weizhou, inherited his position after his father's death, and the emperor could only ratify it. Besides his governorship, the Tang court bestowed upon him many titles, such as "Prince of Ye," "Imperial Secretary," and "Minister of State."
Luo Wei, though a high-ranking official, deeply admired Confucian scholarship and delighted in befriending literati. Quick-witted and sharp-minded, he spent his leisure reading and writing poetry, amassing a personal library of over ten thousand volumes. His greatest joy was to select a scenic spot on a pleasant day, gather a group of poets, scholars, and guests, and compose verses facing the wind or recite poems under the moon—a rare man of refined taste among the bureaucracy. Because he was an ardent admirer of the poet Luo Yin, who styled himself "Jiangdong Student," Luo Wei compiled his own poems written on flowery mornings and moonlit evenings into a collection, titling it *Pilfered from the Jiangdong Student*.
Later, the idiom "Flower Mornings and Moonlit Evenings" came to describe beautiful seasons and scenery.
Source: *Old Book of Tang*, "Biography of Luo Wei"
Meaning of the Idiom: Later, the Chinese idiom "花朝月夕" came to describe beautiful seasons and scenery.