唱些对你不痛不痒的歌
[chàng xiē duì nĭ bù tòng bù yăng de gē]
Translates to 'Sing some songs that neither hurt nor thrill you.' Here, this refers to singing some lukewarm or apathetic songs for a certain person; such songs can hardly bring any strong emotion or reaction from the audience, indicating a somewhat emotionally detached stance towards the addressee.