移商换羽

Explanation: This refers to the music for transfer. Palace, "business", Yu "are ancient music in the tone name pentameter. ① metaphor has changed things. ② metaphor echoed. 　　Source: Song Yuan to China, "Qingping Le (shift operators molt)" word-shift operators molt. Street prostitution to spend the end of words. Toru Qine king and sing live. Heartbroken to eliminate dash. " 　　Examples: The woman cuddle for warmth cold, ~, are you old slut of. ★ Ming Ye Xianzu "floral Phoenix" second folding