"Rose Queens" celebrate during the Rose Festival in Kazanlak, Bulgaria, June 2, 2019. The annual Rose Festival was held on Sunday in Kazanlak. Located some 200 kilometers of Bulgaria's capital Sofia, Kazanlak is a prestigious rose planting and rose oil extraction center of the country. (Photo: Xinhua)

People throw rose leaves to greet visitors during the Rose Festival in Kazanlak, Bulgaria, June 2, 2019. The annual Rose Festival was held on Sunday in Kazanlak. Located some 200 kilometers of Bulgaria's capital Sofia, Kazanlak is a prestigious rose planting and rose oil extraction center of the country. (Photo: Xinhua)

People perform dragon dance during the Rose Festival in Kazanlak, Bulgaria, June 2, 2019. The annual Rose Festival was held on Sunday in Kazanlak. Located some 200 kilometers of Bulgaria's capital Sofia, Kazanlak is a prestigious rose planting and rose oil extraction center of the country. (Photo: Xinhua)

"Rose Queens" wave to people during the Rose Festival in Kazanlak, Bulgaria, June 2, 2019. The annual Rose Festival was held on Sunday in Kazanlak. Located some 200 kilometers of Bulgaria's capital Sofia, Kazanlak is a prestigious rose planting and rose oil extraction center of the country. (Photo: Xinhua)