On 14 March 2005, the National People's Congress of the People's Republic of China passed the Anti-Secession Law, making clear for the first time in legal form the One-China principle. Some people in Taiwan felt dissatisfied about this, and, on March 26, hundreds of thousands of people went to the streets of Taipei, participating in the 326 Protect Taiwan Demonstration, indicating their strong dissatisfaction with and protest of the law. Beginning on 26 April 2005, KMT, and various Pan-Blue political parties visited mainland China, creating an upsurge in the political dialogue between the two sides (see 2005 Pan-Blue visits to mainland China), but cross-straits relations are still full of uncertainty.