First, the combination of theory and practice. Theory is the foundation of scientific research, the more profound and solid theoretical foundation, the more knowledge and literature reserve,the more thinking open, then we can continue to find scientific issues, thus exploit new fields. New fields need to be validated by experiments, through rigorous and precise experiment can guide the development of theory.
Second ,the combination of personally tested and independent thinking. Important experiments must be personally verified, to ensure that the results are objective and true. Independent thinking plus careful analysis and comparison, is the key to open the key of scientific research.