Mainly because the pigs in the Northern Song Dynasty have not been castrated, pork tastes like Sao, so it is called cheap meat, which is not popular in the upper class at all. People don't have enough food to feed pigs, so they rely on swill and wild vegetables. Therefore, pork with small scale, low output and unpopular with nobles naturally cannot attract the attention of chefs. Without the development of recipes, pork naturally becomes more unpopular.

Pork has a long history of breeding in China, and it was recorded in Ceng Zi during the Spring and Autumn Period. But at this time, pork is eaten by ordinary people. In the Northern Song Dynasty, mutton was the main meat in the upper class, and ordinary food could not cause a violent reaction in society without the drive of the upper class.

Today, except sows and boars, all the others are castrated when they are young. On the one hand, castration is to reduce the secretion of sex hormones in pigs and make them grow faster. On the other hand, castrated pork tastes less coquettish and is more acceptable to ordinary people.

Cooking began in the Northern Song Dynasty. But because cooking requires a lot of oil, most of it can only be cooked or steamed. Without special cooking skills, pork will naturally taste bad and no one will eat it. This is actually an infinite loop. Only delicious food can attract customers. Later, Su Dongpo created Dongpo meat, which made people like pork gradually.

Today, pork has become our meat staple food, from high officials to rich people to ordinary people, and the reason is that no one can leave him now because his cooking is so superb. Like the swine fever that broke out in Sichuan last year, although it caused people's panic, it still could not stop people from eating pork. The root cause is that they can't live without it.