How to understand the "hate" in Bai Juyi's Song of Eternal Sorrow?

Hate is regret and resentment. When describing the love between Li and Yang, the author satirizes that the rulers at that time and later should take warning, and don't commit adultery and make mistakes in the country because of "hanging color", resulting in "long hatred" for themselves.

This poem is narrated through the story that Emperor Xuanzong of Tang Dynasty favored Yang Guifei because of lust, which made the country in trouble and put himself in a desolate situation, explaining that lust led to national mistakes and physical mistakes, and asked the rulers to take warning.

Creative background: In the first year of Yuanhe in Tang Xianzong (806), Bai Juyi was appointed as the county commandant (now Xi zhouzhi county). One day, my friends Chen Hong and Wang Zhifu and I visited Xianyou Temple near Ant, and talked about Li Longji and Yang Guifei. Wang Zhifu believes that something as outstanding as this will disappear with the passage of time if it is not polished.

He encouraged Bai Juyi: "Lotte is deeper than poetry and deeper than love. How about trying to make a song? " So Bai Juyi wrote this long poem. Because the last two sentences of the long poem are "the earth lasts forever, and the sky lasts forever;" One day, both will end, and this endless sadness will last forever. "They called this poem" The Song of Eternal Sorrow ". At the same time, Chen Hong wrote a legendary novel "Song of Eternal Sorrow".