Good work comes from hard work, but waste comes from playfulness. —— Han Yu

Books are a huge power. ——Lenin

Be tireless in learning and teaching. —— "The Analects of Confucius"

Curiosity creates scientists and poets. ——France

Isn’t it a pleasure to learn and practice from time to time? ——"The Analects of Confucius"

The sage is the teacher of impermanence. —— Han Yu