A man casts his ballot during the second round of presidential elections at a polling station in Sofia, Bulgaria, Nov. 21, 2021. Bulgarians went to the polls on Sunday morning to vote in the second round of the presidential elections. Nearly 6.7 million eligible voters would choose their president for the next five years between incumbent President Rumen Radev and Rector of Sofia University Anastas Gerdjikov.

A voter uses an electronic voting machine to vote during the second round of the presidential elections at a polling station in Sofia, Bulgaria, Nov. 21, 2021. Bulgarians went to the polls on Sunday morning to vote in the second round of the presidential elections. Nearly 6.7 million eligible voters would choose their president for the next five years between incumbent President Rumen Radev and Rector of Sofia University Anastas Gerdjikov. (Photos: Xinhua)

A woman registers for voting during the second round of presidential elections at a polling station in Sofia, Bulgaria, Nov. 21, 2021. Bulgarians went to the polls on Sunday morning to vote in the second round of the presidential elections. Nearly 6.7 million eligible voters would choose their president for the next five years between incumbent President Rumen Radev and Rector of Sofia University Anastas Gerdjikov.

A voter uses an electronic voting machine to vote during the second round of the presidential elections at a polling station in Sofia, Bulgaria, Nov. 21, 2021. Bulgarians went to the polls on Sunday morning to vote in the second round of the presidential elections. Nearly 6.7 million eligible voters would choose their president for the next five years between incumbent President Rumen Radev and Rector of Sofia University Anastas Gerdjikov.