1 sentence

1. 为了让这段歌词朗朗上口，他改了几个韵。

   wèi​le ràng zhè duàn gē​cí lǎng​lǎng​shàng​kǒu, tā gǎi le jǐ gè yùn.

   He changed a few rhymes to make the lyrics more catchy.

   Source: Dong Chinese Dictionary