念旧忆斑驳回味感愁浓
[niàn jiù yì bān bó huí wèi găn chóu nóng]
It depicts a state of reminiscing past memories that might be fragmentary yet vivid enough to evoke strong feelings of nostalgia mixed with a hint of melancholy. Here it suggests bittersweet memories which make a person lost in recollections and feel sentimental about bygone days.