육우
This period with Cui Guofu was the growing phase for Lu Yu as a man of letters; an incubation period for Lu Yu to practise and sharpen what he learned from his shifu Zou Fuzi. Cui Guofu, with his vast experience and skill in literary work, became a coach that provided the necessary guidance to enhance and mature Lu Yu's writing and literary skills. During this time he wrote "The Classic of Tea".