Protesters shout slogans to protest outside the Regent Hotel, ahead of the opening ceremony of the Taipei-Shanghai Forum, in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)

Shanghai city Vice Mayor Hua Yuan, rear left, Taipei city Mayor Chiang Wan-an, center, and Taipei city Vice Mayor Lin Yi-hua, rear right, witness the signing ceremony of a memorandum of Cooperation during the Taipei-Shanghai Forum in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)

Taipei city Mayor Chiang Wan-an delivers a speech during the Taipei-Shanghai Forum in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)

Taipei city Mayor Chiang Wan-an, center right, talks with Shanghai city Vice Mayor Hua Yuan, center left, after the signing ceremony of a memorandum of Cooperation during the Taipei-Shanghai Forum in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)

Protesters hold slogans reading ''Reject the United Front. Get Out of China'' and ''One Taiwan, One China'' outside the Regent Hotel, ahead of the opening ceremony of the Taipei-Shanghai Forum, in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)

Shanghai city Vice Mayor Hua Yuan delivers a speech during the opening ceremony of the Taipei-Shanghai Forum in Taipei, Taiwan, Tuesday, Dec. 17, 2024. (AP Photo/Chiang Ying-ying)