1. Struggle hard: These four words convey the spirit of positive and continuous struggle.
Aim for a thousand miles: these four words emphasize lofty aspirations and pursuits.
3. High spirits: These four words represent a state of mind full of vitality and high morale.
4. High morale: These four words express a positive attitude and firm determination.
5. Self-improvement: These four words emphasize the spirit of self-improvement and continuous progress.
6. Noble morality: These four words mean to carry and achieve great undertakings with noble morality.
7. Time is not dyed: these four words mean that time will not erode your memory and your feelings will not fade.
8. If you smile: These four words express the meaning that if you smile at life, life will smile at you.
I hope these suggestions can help you.