The first recommendation is "Song of the People's Police" which requires a performance, not a singing version; the second is "Goodbye Police", a classic soundtrack from Infernal Affairs; the third is "Castle in the Sky", which is more complementary The disciplinary work of prison police; the fourth is the symphony of Transformers, such as "No Scarfice, no victory", "There is no plan" and "Arrive to earth". It is mainly to suit the occasion and should be viewed in conjunction with the recitation scene of the poem.