Starting February 7, 2020, the Republic of China (Taiwan) will implement entry restrictions and visa control measures on foreign nationals who have visited or resided in the People’s Republic of China (PRC) in the previous 14 days

Please see the link for details:
https://www.mofa.gov.tw/en/News_Content.aspx?n=1EADDCFD4C6EC567&s=B15583048219C198