The lush grass may be useless, but the rivers and marshes are the home of wild geese; the lush grass in the pavilions and upstairs has become an eternal image in the famous poems of poets throughout the ages.The dust is so small, but each dust and each helping hand represent the enthusiasm of caring for others and helping each other, and they have become the soul of the city of Qingdao! Can you say that dust is useless?Gold shines and illuminates all directions. Do you have such a pair of wise eyes to see the gold in the dust and dig out the halberd in the sand?Give you a pair of wise eyes to let you see clearly and understand that seemingly useless things can also play a huge value.