According to today's headline information, donkey head boiled for three hours is still hard is not the right way to stew, donkey head in the stew, should be placed in a pressure cooker pressure on the 15 to 20 minutes before stewing, and then stewing, so as to achieve the effect of the more stewed the more rotten.
Donkey head name source, "Thousand Gold Food Cure" overview of the base source, for the horse family horse animal donkey's head.