Chu Shi Jian admitted that he was sensitive to numbers, and he still took the trouble to learn from scratch. "In fact, I also learned from growing oranges, and I have to read everything myself." In "Ten Years of Growing Oranges" included in "Biography of Chu", Chu said, "I was not good at math since I was a child, but I have been doing accounts in my heart and I am very sensitive to numbers." In 2009, Chu Shijian gave up tens of thousands of satsumas that had been growing for six or seven years.
Chu Shijian's understanding of this land is beyond everyone's imagination. From 20 12, he made Zhang Xiaojun's evaluation on the promotion and sales of Chu orange in Chengdu. "Chu Lao has a close relationship with the land from the early land reclamation to the management of sugar factories and cigarette factories, and then to the cultivation of oranges at an advanced age. He has been engaged in agriculture, dealing with land and food. Judging from the results of these things he did, they were all successful. When many experts come to the field of Chu orange, they will feel that Chu Lao's respect for nature and understanding and methods of land have been much ahead. And his understanding of agriculture has gone deep into the bone marrow and deep into the soil. "