昨日情长
[zuó rì qíng zhăng]
It translates to 'Long Lasting Love from Yesterday'. This online name implies that the user cherishes past memories or experiences, often associated with romantic nostalgia or bittersweet reminiscence of lost love. The term ‘昨日’ (zuo ri) means 'yesterday', while ‘情长’ (qing chang) refers to long and deep affection.