The principle of beating iron flower is: metal has the characteristics of fast heat conduction, fast heat transfer and fast cooling speed, and it will cool down rapidly in the air. Performers use this characteristic to quickly convert high-temperature molten iron into crushed small particles after hitting high altitude. In the process of flying up or down, these small particles are like sparks falling from electric welding, which basically won't scald people.
Playing Tiehua mostly performs in winter. Because the temperature is low in winter, the open Tiehua can cool down quickly, which is safer for performers. The performer who plays the iron flower must hold two "flower sticks" and strike hard to make the high-temperature molten iron in the "flower stick" hit the sky. The hot molten iron hit the "flower shed" filled with fresh willows, and golden flowers shot everywhere. Only the higher and more scattered, can the molten iron be scattered in the air, turn into tiny scrap iron, burn, cool and land in the air, so as to avoid personnel scalding.
Playing Tiehua is a traditional folk fireworks spread in Henan and Jin Dynasties. It has a long history and can be traced back to the spring and Autumn period and the Warring States period. Its mining and ironmaking industry rose almost synchronously with the smelting history of the Chinese nation. Abundant coal and iron ore resources provide extremely convenient conditions for the development of smelting industry. It flourished in the Ming and Qing Dynasties and has a history of more than 1000 years.