(Political Science) presented an invited paper titled, "Public Opinion on National Defense in Taiwan: One Year after the Ukraine Crisis," in the 2023 Annual Conference at Hoover Institute, Stanford University on May 22-23, 2023. In this article, he analyzed multiple waves of representative surveys (n=10869) in Taiwan before and after the Ukraine Crisis and discussed possible factors that influence the change of willingness to fight in Taiwan. The result shows that Taiwanese people indeed learned from the Ukraine Crisis and carefully observed how other countries responded to the crisis.