One Country on Each Side is a concept consolidated in the Democratic Progressive Party government led by Chen Shui-bian, the former president of the Republic of China (2000–2008), regarding the political status of Taiwan.
In Peng Ming-min’s 1964 Declaration of Formosan Self-Salvation [wikidata], it was stated that “One China, one Taiwan” had been an ironclad fact (「一個中國,一個台灣」早已是鐵一般的事實).
[3] Chen used this phrase in an August 3, 2002, telecast to the annual conference of the World Federation of Taiwanese Associations meeting in Tokyo when he stated that it needs to be clear that "with Taiwan and China on each side of the Taiwan Strait, each side is a country.
"[4] His statements were made in Taiwanese Minnan as opposed to Mandarin and drew a barrage of criticism from the mainland Chinese press, which had previously shied away from the types of attacks it gave to Lee Teng-hui, who promoted a similar "special state-to-state relations [zh]".
[6] The Taiwan Action Party Alliance, founded on 18 August 2019, incorporated One Country on Each Side into its Chinese-language name.