Supporters of this idea have even gone as far as issuing self-made "passports" for their republic. Attempts to use these "passports" however, have been stopped by officials at Chang Kai-shek International Airport. While the Pan-Green camp favors Taiwan having an identity separate from that of China, some Pan-Blue members, especially former leaders from the older generation, seem to be strongly supportive of the concept of the Republic of China, which remains an important symbol of their links with China. During his visit to mainland China in April 2005, former KMT Party Chairman Lien Chan reiterated his party's belief in the "One China" policy that states that there is only one China controlled by two governments and that Taiwan is a part of China. PFP Party Chair James Soong expressed the same sentiments during his visit in May. In contrast to the positions of these two leaders of the older generation, the more mainstream Pan-Blue position is to pursue negotiations with the PRC to immediately open direct transportation links with China and to lift investment restrictions. With regards to independence, the mainstream Pan-Blue position is to simply maintain the ROC's current state, and being open to negotiations for unification after China is democratized enough to respect human rights. For its part, the PRC has indicated that it finds a Republic of China far more acceptable than an independent Taiwan. Ironically, although it views the ROC as an illegitimate entity, it has stated that any effort on Taiwan to formally abolish the ROC or formally renounce its claim over mainland China would result in a strong and possibly military reaction. However, the defense of Taiwan by the US and Japan is likely, so it is not, in reality, clear what the PRC reaction would be. The US's current position is that the Taiwan issue must be resolved peacefully and that it condemns unilateral action by either side, an unprovoked invasion by China or a declaration of formal independence by Taiwan. Current political issues The dominant political issue today in the Taiwan Area in the Republic of China (ROC) is its relationship with the Government of the People’s Republic of China (PRC) that has jurisdiction over Mainland China. Specifically, many people in Taiwan desire the opening of direct transportation links with mainland China, including direct flights, which would aid many Taiwanese businesses that have opened factories or branches in mainland China. The former