念旧是我多年来难改的毛病
[niàn jiù shì wŏ duō nián lái nán găi de máo bìng]
'Being nostalgic for past times is a habit hard to get rid of for years.' It means clinging tightly onto memories or past habits even when it's difficult to change or leave behind. The person using this username perhaps has many unforgettable memories from earlier in their life