What are the reasons for the increase of pork and the reasons that affect the increase of pork price for a long time? Finishing: Lu, Assistant to Dr. Sun Jingmin of Education Group, First of all, there are many reasons for the rise in pork prices. The fundamental reason is that the increase in food prices in the international market has driven the increase in food prices in the domestic market. From the international market, global grain production has been reduced for two consecutive years. Last year, the global grain output was nearly 2 billion tons, 33 million tons less than that in 2005. In addition, the international oil price has remained high for a long time, and some countries use corn to produce ethanol and edible vegetable oil to produce biodiesel, resulting in a tight global supply of corn and edible vegetable oil. In August this year, global corn prices rose by 44%, wheat prices rose by 73%, and soybean prices rose by 52%. What I said just now was the futures price. Spot international market prices, corn prices rose 32%, wheat prices rose 68%, soybean prices rose 40%. The rise in food prices in the international market has also led to an increase in food prices in the domestic market. This is the main reason for the price increase of pork and other non-staple foods. Second, the direct cause of the increase in pork prices this time is the double influence of the low price of live pigs last year and the blue ear disease epidemic, resulting in a decrease in the number of live pigs to be slaughtered. The hog market is characterized by periodic fluctuations. In the second quarter of last year, it was the trough of this round of pig price fluctuation. The lowest price of live pigs is 3.24 yuan per catty. Due to the loss of raising pigs, farmers slaughtered a large number of sows. The outbreak of porcine blue ear disease in southern China since last summer has caused abortion of sows and a large number of deaths of piglets. According to the data of the National Bureau of Statistics, the number of fertile sows in China decreased by 3.6% at the end of last year, and the number of fertile sows decreased by 7% at the end of June this year compared with the end of June the year before last. This has caused a decrease in the supply of live pigs in the market. Third, great changes have taken place in the external environment of pig production, which has also had a negative impact on pig raising. For example, the advancement of industrialization and urbanization has caused the decrease of farmers' free-range sows. There is also a change in the way pigs are produced. Now, the production of live pigs has gradually retreated from free-range households to large-scale professional farmers, increasing the amount of breeding. These two changes have also had some adverse effects on pig production. In addition, the increase of farmers' going out to work and the diversification of farmers' income have reduced the comparative benefit of pig breeding and affected farmers' enthusiasm for raising pigs. Fourth, in terms of demand, with the improvement of people's living standards and the increase of migrant farmers, the demand for pork has also increased.