Performers spray molten iron to entertain visitors during the May Day holiday at the ancient town of Taierzhuang in Zaozhuang city, East China’s Shandong province, May 2, 2019. [Photo/Xinhua]

Performers spray molten iron to entertain visitors during the May Day holiday at the ancient town of Taierzhuang in Zaozhuang city, East China’s Shandong province, May 2, 2019. [Photo/Xinhua]

Performers spray molten iron to entertain visitors during the May Day holiday at the ancient town of Taierzhuang in Zaozhuang city, East China’s Shandong province, May 2, 2019. [Photo/Xinhua]

Performers spray molten iron to entertain visitors during the May Day holiday at the ancient town of Taierzhuang in Zaozhuang city, East China’s Shandong province, May 2, 2019. [Photo/Xinhua]