一个人画圈圈两个人荡秋千
[yī gè rén huà quān quān liăng gè rén dàng qiū qiān]
'Drawing Circles Alone, Two People on the Swing'. Drawing circles might refer to spending alone time; swinging can mean shared good times, so this nickname implies contrasts between loneliness and enjoyment, highlighting a pursuit or memory of companionship.