The lit-up Christmas tree at the downtown Republic Square, heralding the start of New Year celebrations, in Yerevan, Armenia on Dec. 21, 2018. (Photos: Xinhua)

Photo taken on Dec. 21, 2018 shows the lit-up Christmas tree at the downtown Republic Square, heralding the start of New Year celebrations, in Yerevan, Armenia.

Photo taken on Dec. 21, 2018 shows the lit-up Christmas tree at the downtown Republic Square, heralding the start of New Year celebrations, in Yerevan, Armenia.

Photo taken on Dec. 21, 2018 shows the lit-up Christmas tree at the downtown Republic Square, heralding the start of New Year celebrations, in Yerevan, Armenia.

People take part in the Christmas tree lighting ceremony at the downtown Republic Square, in Yerevan, Armenia, Dec. 21, 2018.