How did the ancient China introduce the ghost fire?

In midsummer, a fire suddenly pops up behind you and will go with you. Is it scary? Is there a ghost?

If on a midsummer night, anyone passing by a place with many wild graves may find a flashing green spark, which is very strange. If you run fast, the fire will follow you, which is creepy. The ancients thought that ghosts were at work, so they called this mysterious flame "ghost fire". Usually in rural areas, rainy weather appears in graves and occasionally in cities. So what is a "ghost fire"? And there are legends about ghost fires all over the world.

There are also many legends about ghost fires in China. Wang Yi of the Han Dynasty was "radiant and full of ghosts and fire." Qian Shu Guan revised the poem "Difficult to Walk": "Don't you see that the ancient emperor burned gold and alchemy, and ghosts flashed in the poplar." Wang's "Ghost Hunting": "Ghost fire flashes into the wild temple! The wild temples are full of ghost fires! " Ghost fire is often mentioned in Pu Songling's Strange Tales from a Lonely Studio in Qing Dynasty, but people think it is Yan Luowang's ghost lamp. When Japanese draw ghosts, they often draw a few ghost fires beside them. Halloween jack-o'-lantern in Ireland is derived from jack-o'-lantern. The theme of Andersen's fairy tale "Ghost fire into the city" is ghost fire.