Forgive me for my ignorance, but the last sentence of "Falling in love is not a heartless thing, but turning into spring mud will protect flowers more" seems to be "I am sad in the daytime, and my whip points to the east and points to the horizon" and "Five sea poems"?

"Castle Peak is full of loyal bones" seems to be changed from "Castle Peak is fortunate to bury loyal bones, and white iron casts innocent courtiers". This is a couplet carved on the stone pillar of Wang Yue's tomb in West Lake. "Why did they die in boots" should come from Qing Xu Xilin's The Embankment. "Military songs to sing broadsword ring, vowed to destroy Hu Nu, a jade pass. Only for the country to break the family and solve the battlefield, why are they still wearing boots when they die! " This allusion comes from the Biography of Ma Yuan in the later Han Dynasty.

As for "why are they buried everywhere in the green hills in boots when they are dead", I don't know if it comes from the same poem.