Girls throw rose petals to welcome guests during the Rose Festival in the Kazanlak city, Bulgaria, June 3, 2018. The annual Rose Festival is held here in Bulgaria, with activities including rose picking, dance performances and parade. (Xinhua/Zhan Xiaoyi)

Girls dressed in traditional Bulgarian costumes perform during the Rose Festival in the Kazanlak city, Bulgaria, June 3, 2018. The annual Rose Festival is held here in Bulgaria, with activities including rose picking, dance performances and parade. (Xinhua/Zhan Xiaoyi)

The Rose Queen (C) waves to the guests during the parade of the Rose Festival in the Kazanlak city, Bulgaria, June 3, 2018. The annual Rose Festival is held here in Bulgaria, with activities including rose picking, dance performances and parade. (Xinhua/Zhan Xiaoyi)

People perform dragon dance during the parade of the Rose Festival in the Kazanlak city, Bulgaria, June 3, 2018. The annual Rose Festival is held here in Bulgaria, with activities including rose picking, dance performances and parade. (Xinhua/Zhan Xiaoyi)

A visitor puts a rose wreath on her head during the Rose Festival in the Kazanlak city, Bulgaria, June 3, 2018. The annual Rose Festival is held here in Bulgaria, with activities including rose picking, dance performances and parade. (Xinhua/Zhan Xiaoyi)