What is the meaning of the title of Li Yuanjia's poem "Serve the monarch and guard against his feelings" in Tang Dynasty?

"Fang Ai" is an official named "Prince Prison".

"Serve peace" is a modest word. And the rhyme of poetry. Same as-and. The title means: a poem that goes against love and rhymes with the prince's prison

Difficulties:

1; Shou is a surname. In the Song Dynasty, there was a man named Shou, who made friends with Su Shi. 2; Retaining subordinates, if you don't pay attention, it is easy to become a "prince guard." The official name is "the prince's prison", not "the prince's prison", but probably the prince's guard.