Pinyin: yí f ě ng yú
Interpretation: shift: change; Yi: Transformation. Change old customs and habits.
Source: Xunzi's "On Music": "Musicians are happy for saints and can be kind to people. They are touching and change customs, so Wang Dao first used rites and music to make people harmonious. "
Synonym: bring forth the old and bring forth the new, break the old and establish the new.
Antonym: Obedience, invariability
There is no such poem, is there?