Singapore maintained unofficial relations with both the ROC and the PRC until 1992. It was decided in the Second Ministerial Meeting of APEC as chaired by Singapore in 1990 for the inclusion of the ROC commencing with the Third Ministerial Meeting in Seoul. After the establishment of diplomatic ties between Singapore and PRC on 3 October 1992, Singapore maintained close economic and military ties with Taiwan as part of its attempt to position itself as a neutral party. A diplomatic row broke out between China and Singapore when Lee Hsien Loong visited Taiwan one month before he was sworn in as the Prime Minister of Singapore. Singapore's Ministry of Defence moved to correct an erroneous report in the Liberty Times on a joint military exercise between the Singapore and Taiwan in March 2005. Singapore is the only foreign country to maintain military training camps in Taiwan, and continues to regularly send infantry, artillery, and armoured personnel there for training. The PRC has offered to support relocating some or all of these facilities to Hainan. On the issue of United Nations participation for Taiwan, George Yeo and Mark Chen, the two countries' Foreign Ministers at the time, engaged in a heated exchange of views in 2004 between Beijing's insistence that FTA can only be concluded among sovereign states complicates matters for Taiwan. Accordingly, Singapore and Taiwan signed the "Agreement between Singapore and the Separate Customs Territory of Taiwan, Penghu, Kinmen and Matsu on Economic Partnership (ASTEP)" in November 2013.