Domingos Simoes Pereira, candidate of the African Party for the Independence of Guinea and Cape Verde (PAIGC), votes at a polling station in Bissau, Guinea-Bissau, Dec. 29, 2019. Guinea-Bissau's presidential election runoff kicked off here on Sunday between two former prime ministers, Domingos Simoes Pereira and Umaro Sissoco Embalo. (Xinhua/Xing Jianqiao)