由宋怀芝编写的《铁杵磨成针》讲述了：The illustrious Tang Dynasty poet Li Bai was not at all studious when young. One day he chanced upon an old woman grinding an iron pole against a rock. Her goal: To make a fine embroidery needle. Inspired by her determination, Li Bai mended his ways and studied hard.

宋怀芝