Hsiao Hsu-tsen, director of the Ma Ying-jeou Foundation, speaks during a news conference in Taipei, Taiwan March 20, 2023. REUTERS/Ben Blanchard 

A visitor walks by an image of Chinese President Xi Jinping shaking hands with then Taiwan president Ma Ying-jeou, at the Museum of the Communist Party of China in Beijing, China September 3, 2022. REUTERS/Florence Lo 

Visitors stand near an image of Chinese President Xi Jinping shaking hands with then Taiwan president Ma Ying-jeou, at the Museum of the Communist Party of China in Beijing, China November 11, 2021. REUTERS/Carlos Garcia Rawlins 

Terry Gou, founder and chairman of Foxconn, Former Taiwan President Ma Ying-jeou and Kaohsiung Mayor Han Kuo-yu pose for photo after a forum in Taipei, Taiwan, April 30, 2019. REUTERS/Tyrone Siu 

Terry Gou, founder and chairman of Foxconn shakes hands with Kaohsiung Mayor Han Kuo-yu, next to Former Taiwan President Ma Ying-jeou during a forum in Taipei, Taiwan, April 30, 2019. REUTERS/Tyrone Siu 

New Taipei City Mayor Eric Chu (2nd-L), former President Ma Ying-jeou (3rd-L), Taipei mayoral candidate Ting Shou-chung (3rd-R) and opposition Nationalist Kuomintang Party (KMT) Chairman Wu Den-yih (2nd-R) attend a campaign rally for the local elections, in Taipei, Taiwan November 11, 2018. REUTERS/Tyrone Siu 

Former Taiwan President Ma Ying-jeou holds a flower wreath during a memorial ceremony marking the 60th anniversary of Second Taiwan Strait Crisis at Taiwushan Cemetery, in Kinmen county, Taiwan August 23, 2018. REUTERS/Tyrone Siu 

Members of the Kuomintang greet former Taiwanese President Ma Ying-jeou leaving from an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Members of the Kuomintang hold a placard reading, "Injustice, President Ma Cheer Up", as former Taiwanese President Ma Ying-jeou leaves from an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Members of the Kuomintang hold a placard reading, "Injustice, President Ma Cheer Up", as former Taiwanese President Ma Ying-jeou leaves from an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Former Taiwan President Ma Ying-jeou is surrounded by journalists as he leaves from an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Former Taiwan President Ma Ying-jeou attends an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Former Taiwan President Ma Ying-jeou attends an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Former Taiwan President Ma Ying-jeou attends an event in Taipei, Taiwan May 15, 2018. REUTERS/Tyrone Siu 

Taiwan's former president, Ma Ying-jeou, attends a gathering at the National Taiwan University after he was charged with leaking state secrets, in Taipei, Taiwan March 14, 2017.REUTERS/Tyrone Siu 

Taiwan's former president, Ma Ying-jeou, attends a gathering at the National Taiwan University after he was charged with leaking state secrets, in Taipei, Taiwan March 14, 2017.REUTERS/Tyrone Siu 

Taiwan's former president, Ma Ying-jeou, attends a gathering at the National Taiwan University after he was charged with leaking state secrets, in Taipei, Taiwan March 14, 2017.REUTERS/Tyrone Siu 

Taiwan's former president, Ma Ying-jeou, attends a gathering at the National Taiwan University after he was charged with leaking state secrets, in Taipei, Taiwan March 14, 2017.REUTERS/Tyrone Siu 

Former Taiwan president Ma Ying-jeou speaks to guests as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou speaks to guests as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou (L) speaks with Jerome Cohen, Professor at New York University of Law during an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou (L) speaks with Jerome Cohen, Professor at New York University of Law during an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou smiles as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou (L) speaks with Jerome Cohen, Professor at New York University of Law during an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou speaks to guests as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan president Ma Ying-jeou (L) speaks with Jerome Cohen, Professor at New York University of Law during an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan President Ma Ying-jeou smiles as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan President Ma Ying-jeou arrives to attend an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan President Ma Ying-jeou speaks to guests as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former Taiwan President Ma Ying-jeou speaks to guests as he attends an event at Asia Society in New York, U.S. March 1, 2017. REUTERS/Eduardo Munoz 

Former President Ma Ying-jeou appears in court for his political leaks controversy, in Taipei, Taiwan January 10, 2017. REUTERS/Tyrone Siu 

Former President Ma Ying-jeou appears in court for his political leaks controversy, in Taipei, Taiwan January 10, 2017. REUTERS/Tyrone Siu 

Former President Ma Ying-jeou appears in court for his political leaks controversy, in Taipei, Taiwan January 10, 2017. REUTERS/Tyrone Siu 

Former President Ma Ying-jeou appears in court for his political leaks controversy, in Taipei, Taiwan January 10, 2017. REUTERS/Tyrone Siu 

President Tsai Ing-wen (R) and former President Ma Ying-jeou (2nd L) attend National Day celebrations in Taipei, Taiwan, October 10, 2016. REUTERS/Tyrone Siu

Taiwan’s President Tsai Ing-wen (R) and former President Ma Ying-jeou attend an inauguration ceremony in Taipei, Taiwan May 20, 2016. REUTERS/Tyrone Siu 

Taiwan’s President Tsai Ing-wen (R) and former President Ma Ying-jeou wave during an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwan's President Tsai Ing-wen (R) shakes hands with former President Ma Ying-jeou during a swearing in ceremony at the Presidential Office in Taipei, Taiwan May 20, 2016. REUTERS/Taipei Photojournalists Association/Pool 

Taiwan’s President Tsai Ing-wen (C) and former President Ma Ying-jeou (L) attend an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwan’s new president Tsai Ing-wen (R) and former president Ma Ying-jeou wave during an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwan’s former president Ma Ying-jeou (L) waves beside the new president Tsai Ing-wen as they attend an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwan’s new president Tsai Ing-wen (R) and former president Ma Ying-jeou attend an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwan’s new president Tsai Ing-wen (L) and former president Ma Ying-jeou is seen on a screen broadcasting for spectators outside the Presidential Office during an inauguration ceremony in Taipei May 20, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-jeou (C) walks as he arrives at Pengjia Islet, the northern most island controlled by Taiwan, April 9, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-jeou (R) tours a lighthouse as he visits Pengjia Islet, the northern most island controlled by Taiwan, April 9, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-jeou (R) waves from a lighthouse as he visits Pengjia Islet, the northern most island controlled by Taiwan, April 9, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-jeou points a map of the "Taiwan-Japan Fisheries Agreement" during a monument unveiling event at Pengjia Islet, the northern most islands controlled by Taiwan, April 9, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-jeou speaks during a monument unveiling event at Pengjia Islet, the northern most island controlled by Taiwan, April 9, 2016. The word on the monument reads, "Peace in the East China Sea and our national territory secure forever". REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou waits for President-elect Tsai Ing-wen's arrival before discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou (R) shakes hands with President-elect Tsai Ing-wen (L) after discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou leave with President-elect Tsai Ing-wen after discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou (R) waves to President-elect Tsai Ing-wen (2nd-L) after discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou (R) shakes hands with President-elect Tsai Ing-wen (L) after discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwanese President Ma Ying-Jeou shakes hands with President-elect Tsai Ing-wen after discussing the transfer of power in a meeting in Taipei, Taiwan March 30, 2016. REUTERS/Tyrone Siu 

Taiwan President Ma Ying Jeou answer questions on Taiping island, also known as Itu Aba, during a news conference with the press in Taipei, Taiwan March 23, 2016. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY

Taiwan President Ma Ying Jeou answer questions on Taiping island, also known as Itu Aba, during a news conference with the press in Taipei, Taiwan March 23, 2016. REUTERS/Tyrone Siu 

Taiwan President Ma Ying Jeou answer questions on Taiping island, also known as Itu Aba, during a news conference with the press in Taipei, Taiwan March 23, 2016. REUTERS/Tyrone Siu 

A memorial plaque signed by Taiwan President Ma Ying-jeou, which is engraved with the words, "Peace in the South China Sea and our national territory secure forever", is seen in Itu Aba, which the Taiwanese call Taiping, South China Sea, March 23, 2016. REUTERS/Fabian Hamacher TPX IMAGES OF THE DAY

Taiwan's President Ma Ying-jeou holds hands of former comfort woman Chen Lien-hua (3rd L) during a ceremony unveiling the nameplate of a museum dedicated to Taiwan's "comfort women" on International Women's Day, in Taipei, Taiwan, March 8, 2016. REUTERS/Fabian Hamacher 

Taiwan's President Ma Ying-jeou (4th L) and former comfort woman Chen Lien-hua (4th R) attend a ceremony unveiling the nameplate of a museum dedicated to Taiwan's "comfort women" on International Women's Day, in Taipei, Taiwan, March 8, 2016. REUTERS/Fabian Hamacher