我将这段内容重新表述如下：

铁杵磨针的故事源自宋代文学家祝穆在其著作《方舆胜览·眉州·磨针溪》中提到的传说。故事讲述了一个老媪在磨needle from a piece of iron，iron hammering, and the old woman said that she wanted to make needles. Li Bai was impressed by her determination and decided to go back to his studies.

The story is about an old woman who lives in a small village called Mowei Mountain, where there is a stream called Needle Stream. The old woman wants to make needles from iron, but she needs deep skill and patience. She tells Li Bai that it takes time and effort, but with enough practice, anything can be accomplished.

Li Bai is inspired by the old woman's perseverance and decides to continue his studies. He returns home and finishes his education with renewed determination. The story has become a famous Chinese proverb "只要功夫深，铁杵磨成针" which means that if one puts in enough effort, even the most difficult tasks can be achieved.

The story highlights the importance of perseverance and hard work in achieving one's goals. It encourages people to keep practicing until they achieve their desired results, no matter how difficult it may seem at first glance.