"The sea is wide and the fish jumps, and the sky is high and birds fly" is a famous proverb of China, which comes from the fantasy poem of Tang Priest. The specific poems and topics will not be studied for the time being.

"The sky is vast, and birds can fly" means that the vastness of nature provides a vast space for fish to jump and birds to fly, which can be extended to how important it is to provide talents with space to display their talents, and can also be understood as how precious it is to have freedom.