Though retired in 1993, professor Sun Yizhi has never stopped his pursuit for science and technology extension. Jindun Publishing House,China Agriculture Press and Shaanxi Science and Technology Press witnessed professor Sun’s life after his retirement---over 1 million words of 8 books on science and technology applied in pest control of fruit trees were published, whose circulation has exceeded 200 thousands and have greatly helped the people who were in need of sci-tech guidance in this field. 
Pest Control of Apple Tree
New Techniques in Chestnut Cultivation and Processing
New Skills in Planting High Yield and Quality Red-Globe Grape
Bio-pest-control of Fruit Trees
New Techniques in Pest Control of Walnut Trees
100 Questions and Answers in Pest Control of Walnut and Chestnut 
A Handbook in Pest Control of Persimmon 
Translated by: Zhao Rui
Proofread by: Yan Xianhui