In the old feudal era, cattle were not allowed to be killed casually. If you wanted to kill a cow without the government's consent, you would have to wait to go to jail.

Therefore, at least in the Song Dynasty and before the Song Dynasty, it was definitely unscientific for inns to sell beef casually.

Not to mention beef, mutton was not something ordinary people could eat. At that time, there was class. Ordinary people ate pork, but only those with a certain status were eligible to eat mutton.

Therefore, whether it is a martial arts novel or a novel like Water Margin, it is seriously unscientific to just go to an inn and ask the waiter for two pounds of beef.