Georgia O 'Keeffe, an American artist, is listed as one of the masters of art in the 2th century. Ou Jifu's paintings have become a classic representative of American art in the 192s. She is famous for her semi-abstract and semi-realistic techniques, and her themes are quite distinctive, mostly the microscopic flowers, changes in rock texture, conch, animal bones and desolate American inland landscape. Her works are often full of subtle changes in the same tone, forming a rhythmic composition. Sometimes, the outline of the object in Ou Jifu's paintings makes the viewer feel the lightness and crispness of the object.