Swallow a knife and spit a fire
Chinese idiom, Pinyin is t ū nd ā ot ǔ Hu ǒ, meaning is one of the ancient zaju, commonly known as magic. It comes from Xijing Fu by Zhang Heng of Han Dynasty.
The origin of Idioms
In the ode to Xijing written by Zhang Heng of Han Dynasty, "swallowing a sword and spitting a fire, clouds and mist vanish."
Idiom usage
It is generally called magic. Dan and zhunai pull the horse and break the tongue. From: biography of Xia Tong in the book of Jin
Chinese PinYin : tūn dāo tǔ huǒ
Swallow a knife and spit a fire