In 2007, affected by the epidemic of blue ear disease, the price of pork in China reached a record high. The state has introduced a subsidy policy to encourage large-scale farming. In 2008, with a large amount of funds entering the aquaculture industry, the supply of pork began to exceed demand. Since the second half of the year, pork prices have continued to fall. In mid-2009, the price of live pigs dropped to 8 yuan/kg. The price of meat bottomed out and farmers suffered a large loss. Inventory is decreasing. In the middle of 20 10, the gap between supply and demand in the live pig market gradually widened, and the price of live pigs in China entered a rising cycle. With the increase of live pig price, the profit per pig continuously broke through 100 yuan and 200 yuan mark, while during the period of 20 10 1, the profit per pig broke through 300 yuan. 50638.86868686666