痴人念旧
[chī rén niàn jiù]
'Foolish Person Longing For The Old Days'. Here, '痴人' (chiren) literally translates as 'a foolish or obsessed person', whereas 念旧(nianjiu) stands for being nostalgic about old memories. Hence, it expresses someone longing back for those days with bittersweet feelings and even a little obsession or folly. This screen name could denote someone who feels sentimental over the good old days.