唱首忐忑纪念同桌
[chàng shŏu tăn tè jì niàn tóng zhuō]
Singing a song 'Tǎn Tè' to honor the memory shared with desk mates in a class. The word 'tǎn tè' (忐忑) actually means anxious, so there's a double entendre implying both feeling and singing in remembrance of old times and people.