Without some bold and unbridled conjecture, it is generally impossible to make progress in knowledge. ——Einstein

·Scientific research work is especially full of creative significance, especially relying on self-reliance. Of course, being self-reliant does not mean closing yourself off. ——Li Siguang

·We must remember that the silkworm that has made a cocoon cannot see the world outside the cocoon. ——Li Siguang

·Some old-fashioned and unrealistic things, whether they are foreign-style or earth-like, we must vigorously break them and boldly create new methods and new theories. , to solve our problems. ——Li Siguang

·…The bee takes a middle path. It collects materials from flowers in gardens and fields, but uses its own power to change and digest this material. ——Bacon

·In scientific research, it is allowed to create any hypothesis, and if it explains a large number of independent facts, it rises to the level of a well-founded theory. ——Darwin

·In the natural sciences, creating methods and studying certain important experimental conditions is often more valuable than discovering individual facts. ——Pavlov

·If a person wants to do something, he must go his own way. To open up new paths, the most important thing is whether you can ask questions yourself. Being able to ask questions correctly is the first step towards innovation.

——Li Zhengdao