However, the One-China Principle would apparently require that Taiwan formally give up any possibility of Taiwanese independence, and would preclude any "one nation, two states" formula similar to ones used in German "Ostpolitik" or in Korean reunification. Chen Shui-bian, president of the Republic of China between 2000 and 2008 repeatedly rejected the demands to accept the One China Principle and instead called for talks to discuss One China itself. With the January and March 2008 elections in Taiwan, and the election of Ma Ying-jeou as the President of the ROC, who was inaugurated on May 20, a new era of better relations between both sides of the Taiwan Strait was established. KMT officials visited Mainland China, and the Chinese ARATS met in Beijing with its Taiwanese counterpart, the Straits Exchange Foundation. Direct charter flights were therefore established.