Hog is a general term for domestic pigs other than breeding pigs that are not slaughtered. Hog farming is a series of breeding and reproduction process through breeding pigs, piglet fattening and so on until the commercial meat pig, during which it has gone through the stages of breeding pigs - fertile sows - commercial meat pigs and so on. The raw materials of hog breeding are taken from the feed industry, and the hogs are slaughtered and processed through the slaughtering and processing industry to face the consumers directly. The hog farming industry chain is mainly composed of planting industry → grain processing → feed processing → hog farming → hog slaughtering, deep processing → agricultural products market, supermarkets → catering / dining table, involving planting, chemical synthesis, grain and oil processing, feed processing, breeding, veterinary drugs and vaccines, food processing, machinery manufacturing, leather manufacturing, logistics, retailing, catering and transportation, etc. In 2021, China's hog slaughtering volume will be about 1.5 million cubic meters, and the total number of hogs will be about 1.5 million. In 2021, China's hog slaughtered about 670 million heads, the total output value of 2.05 trillion yuan, with the recovery of the epidemic, it is expected that the future production and sales of hogs will be further improved, the output of 700 million head of the market size will reach 2.14 trillion yuan.
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