Wen Zhiming's "Poems of Falling Flowers" is a representative work of calligraphy in small letters. The characters in small letters are usually about 1 cm square, and those smaller than 1.5cm generally belong to small letters, such as Ling Fei Jing, Tao Te Ching, Thirteen Lines of Luo Shen, Le Yi Lun, etc. Some of them are 5-6mm smaller than Yin Fu Jing, and most of them in Wen Zhiming.