“As long as you work hard, an iron pestle can be ground into a needle!” is one of my favorite quotes. Its origin is also connected with a story. It is said that Li Bai was studying in Elephant Er Mountain. He gave up his studies before completing his studies. "Crossing the stream, I met an old woman grinding an iron pestle and asked her, 'I want to make a needle.' Taibai understood his meaning and graduated." This famous saying tells me a truth: Although the iron pestle is big and thick, it is very difficult to grind it into a needle, but as long as you work hard and have perseverance, then day after day, year after year, the iron pestle can be polished into a needle. It can be ground into an embroidery needle. In fact, we are the same when we study. We will eventually encounter some difficulties. At this time, we should persevere and not stop halfway. Then, no matter how big the difficulties are, we will definitely overcome them!