Jisen Shi, professor, Nanjing Forestry University, has been engaged in the research and teaching of tree genetic breeding for a long time. Taking Chinese fir and hybrid liriodendron-mountain trees as research objects, he has carried out in-depth research into conventional breeding, molecular marker-assisted breeding, genetic engineering and genetic transformation, the breeding of new varieties, and engineering the large-scale breeding of improved seed cells, and he has made outstanding achievements.