The intangible cultural heritage Chinese folk custom melting iron firework Show (Da Tie Hua) is performed in Qingdao, Shandong Province, Feb. 9, 2019. The four-day performance from Feb 7 to 10 celebrates the ongoing Spring Festival. [Photo: VCG]"

The intangible cultural heritage Chinese folk custom melting iron firework Show (Da Tie Hua) is performed in Qingdao, Shandong Province, Feb. 9, 2019. The four-day performance from Feb 7 to 10 celebrates the ongoing Spring Festival. [Photo: VCG]"

The intangible cultural heritage Chinese folk custom melting iron firework Show (Da Tie Hua) is performed in Qingdao, Shandong Province, Feb. 9, 2019. The four-day performance from Feb 7 to 10 celebrates the ongoing Spring Festival. [Photo: VCG]"

The intangible cultural heritage Chinese folk custom melting iron firework Show (Da Tie Hua) is performed in Qingdao, Shandong Province, Feb. 9, 2019. The four-day performance from Feb 7 to 10 celebrates the ongoing Spring Festival. [Photo: VCG]"