Li Dongwei said in his speech on May 20, 1990 that "Taiwan and the mainland are China's indivisible territory, all Chinese compatriots who are connected to the bloodstream, culture and technology", "China's unification and prosperity are the common expectations of all Chinese." This is in line with the common understanding of the people on the two sides of the Strait and "not to hinder the use of armed forces" in Taipei on the morning of May 20, 1990. Li Dongwei said in his speech, "Taiwan and the mainland are China's indivisible territory, all Chinese compatriots who are connected to the bloodstream", but repeatedly put forward the impossible prerequisite for realization: to change the mainland's political economy and the promise of non-usage of armed forces and "not to hinder