Abstract: I am a peasant. In order to increase the yields of cotton and grain and breed new varieties, I began to work on distant crossing of cotton in 1957. The sexual hybridization was conducted by using the cotton and castor bean plants possesing the characters such as strong adaptability, short branches of fructification, better fructifying ability, resistence to insect pest and drought and cold injury. In 1962, I obtained the new variety "Mine-Nung No. 14" which had the characteristics of both cotton and castor bean plants. Later the petwheat was also obtained. Now the two new varieties of cotton and wheat have been put on production, and well received by the poor and lower-middle peasants. In the twenty years engaged in research on distant crossing, I was constantly opposed by class enemy and the bourgeoisie in the party. The bourgeois specialists and "authorities" also said "That I was a 'bumpkin', did not know science", "The castor-cotton was false" etc. But in accordance with the need of production, I did away with all fetishes and superstitutions, emancipated the mind, followed Chairman Mao's teaching of the primary standpoint of practice, upheld the philosophy of struggle, finally obtained certain results. I consider that all genuine knowledge originates in direct experience, and both the theory and practice of distant crossing have the wide prospect for future development.