Academic symposium on “Cross-disciplinary Dialogue in the Application of Principle of Proportionality” was held in CUFE on March 4th.More than 80 experts from domestic universities, research institutions and university of Potsdam participated in the symposium and had a comprehensive and in-depth discussion about the principle of proportionality from various academic fields including constitution, administrative law, procedure law, penal law, civil and commercial law, economic law and international law.