Performers parade with masks during a celebration of the International Mask Festival in Pelnik in Bulgaria, Feb. 2, 2013. All together 6,092 performers from 11 countries and regions participated in this year's festival.(Xinhua/Chen Hang)

Performers parade with masks during a celebration of the International Mask Festival in Pelnik in Bulgaria, Feb. 2, 2013. All together 6,092 performers from 11 countries and regions participated in this year's festival.(Xinhua/Chen Hang)

Performers parade with masks during a celebration of the International Mask Festival in Pelnik in Bulgaria, Feb. 2, 2013. All together 6,092 performers from 11 countries and regions participated in this year's festival.(Xinhua/Chen Hang)