1. The edge of a sword comes from sharpening, and the fragrance of plum blossoms comes from the bitter cold. 2. Compared with the bone-chilling cold, there is no fragrance of plum blossoms. 3. It only takes time and effort to grind an iron pestle into a needle. 4. Three feet of ice cannot be frozen in one day. 5. Nothing is difficult in the world, only those who are willing can do it. 6. Wherever sincerity comes, gold and stone will open. 7. How can you see a rainbow without experiencing wind and rain? 8. He who eats his own food, sweats his own sweat, does his own work, and relies on his ancestors is not considered a true man. Hope it will be adopted.