子衿 诗经

青青子衿，悠悠我心。 纵我不往，子宁不嗣音。 青青子佩，悠悠我思。 纵我不往，子宁不来。 挑兮达兮，在城阙兮。 一日不见，如三月兮。

My loved one, your collar (literal translation)

Green are your collars, so dear to my heart. Though I do not go to you, will you not send me a message? Green are your jade pendants, so dear to my thoughts. Though I do not go to you, will you not come to me? I look for you, I gaze at you, at the city gate. A day without seeing you is like three months.