雪泥鴻爪（雪泥鴻爪）　

◎ 雪泥鴻爪 xuění-hóngzhǎo

[traces of the past;human life lihened to that of birds of passage with foot print on the sand] 雪地上偶然留下的鴻雁爪 印。比喻往事遺留的痕跡。也指人生際遇不定,蹤跡無常