Before the Tang Dynasty, I thought beef was more common, especially in the Qin Dynasty, because there were more cows than pigs in the previous dynasties, and all kinds of TV dramas were about Xiao Er, two ounces of beef or half a catty of beef instead of half a catty of pork, so it was rare. Appeared in some novels after the Tang Dynasty, some of these butchers who killed pigs proved that pork had entered people's lives.