长春市朝鲜族中学师生,认真贯彻“教育必须为无产阶级政治服务,必须同生产劳动相结合”的方针,积极开展农业科学实验活动。他们敢想敢干,自1971年起采用胚乳交换法搞水稻和高梁杂交,培育水稻高产品种。 Teachers and students of the middle school in Changchun, Korean, conscientiously implement the “education must serve the proletarian politics must be combined with the production of labor,” and actively carry out agricultural science experiment. They dare to think hard and dry, since 1971 the endosperm exchange method to engage in hybridization of rice and sorghum, cultivate high-yielding varieties of rice.