莫忘初勿念旧
[mò wàng chū wù niàn jiù]
'Mo Wang Chu Wu Nian Jiu' can be interpreted as Do not forget your original intention and don't dwell on the past. It conveys the sentiment that we should stick to our heart when we first start but also try to let bygones be bygones instead of brooding over past regrets, failures, or mistakes which may hold us back and prevent us from progressing forward.