三年梦七年痛
[sān nián mèng qī nián tòng]
'Three Years Dream, Seven Years Pain' represents a profound feeling of sorrow. The netizen feels that good dreams or sweet times last only for three years, but the pain and memories left from these dreams linger on for a much longer time, even up to seven years, reflecting long-lasting sadness or regret after the beauty of youth or love fades away.