What does it mean that light smoke is scattered into Wuhou Mansion?

Light smoke scattered into the homes of five marquis generally refers to the Eastern Han Dynasty. After that, Emperor Huan of the Han Dynasty appointed five eunuchs to be favored as marquis in one day. Here, the Han Dynasty is used as a metaphor for the Tang Dynasty, alluding to eunuchs who have been favored by the emperor since the middle Tang Dynasty. This sentence can be understood as the light smoke of dignitaries (royalty) drifting to the home of the emperor's favorite (five princes).

This sentence comes from the Tang Dynasty poet Han Yu's "Cold Food", "The spring city is full of flowers, and the cold food records the east wind and willows." At dusk, candles were passed in the Han Palace, and light smoke was scattered into the Hall of the Five Emperors. " Interpretation: In late spring, catkins are flying and falling red everywhere in Chang 'an City, and the east wind blows the willow branches of the imperial garden during the Cold Food Festival. As night fell, the palace was busy handing out candles, and smoke curled into the homes of princes and nobles.

The first two sentences of this poem describe the scenery during the day, the charming spring scenery and the scenery of the whole court garden in Chang 'an. The last two sentences are about the night scene, which vividly draws a picture of candles at night, making people see the light of candles and smell the faint smoke. The whole poem is realistic by line drawing, depicting the royal style, full of intoxication of the spring scenery of the imperial capital and singing of Chengping in the prosperous times. From the emperor at that time to the ordinary courtiers, they all preferred the poem and always spoke highly of it.