The sophistication and complexity of the Chinese arts of poetry, calligraphy, painting, and playing of music reached new heights during this age. The earlier Cao Zhi, son of Cao Cao, is regarded as one of the greatest poets of his day. His style and deep emotional expression in writing influenced later poets of this new age, such as Tao Qian (365–427) or Tao Yuanming. Even during his lifetime, the written calligraphy of the "Sage of Calligraphy", Wang Xizhi (307–365), was prized by many and considered a true form of personal expression like other arts. Painting became highly prized with artists such as Gu Kaizhi (344–406), who largely established the tradition of landscape art in classical Chinese painting (to learn more, refer to the "Far East" section of the article for Painting).