1. When Heaven is about to assign a great responsibility to a person, he must first strain his mind and will, strain his muscles and bones, starve his body and skin, deplete his body, and mess up his actions. ——"Mencius 6.1 Gaozi 2"

2. Knowledge comes from hard work, and any achievement is the result of hard work. ——Song Qingling

3. How can you get the fragrance of plum blossoms without experiencing a bone-chilling cold?