In the future if the coastline is completely dug away, the waves will simply run directly up against cliffs. "Your children, which is to say my grandchildren's generation, will have no beaches at all to play on," says Wu Tien-yun to his students.
以後海岸被淘空，大海一上來就是絕壁，「你們的孩子，也就是我的孫子輩，就沒有沙灘與大海可玩了！」吳天雲也對學生說。