Jiangshi are undead creatures of Chinese mythology

It is typically depicted as a stiff corpse dressed in official garments from the Qing Dynasty, and it moves around by hopping, with its arms outstretched. It kills living creatures to absorb their qi, or “life force”, usually at night, while in the day, it rests in a coffin or hides in dark places such as caves. 

They were said to have long hair, eyebrows, and fingernails, as well as the ability to fly.

The yellow patch ( fúzhòu) contains a Taoist incantation to disempower the cursed Jiangshi creature by slapping the patch on its head. They’re also afraid of the  Bāguà symbol, jujubes, vinegar and the blood of a black dog.