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1. Murray said in the article that the essence of dog domestication is a kind of "social relationship", which is clearly reflected in people's behavior of burying dogs. He claimed that his research results provided the strongest evidence for when humans began to keep dogs. It can be inferred that dogs may have been domesticated by humans as early as 1.4 million years ago.

2. China is the first country in the world to domesticate pigs. Pigs were domesticated about 67000 years ago, even 1000 years ago. The working people in ancient times domesticated wild boar because they couldn't finish eating it for a while or for other reasons.

In fact, dogs are the earliest domesticated animals, which is beyond doubt. It was domesticated in the Neolithic Age about ten thousand years ago. A large number of dog bone communities were found in the ancestral living area of Anbanpo cultural site in Xi 'an. In addition, the images of four domestic dogs were also found on the painted pottery pots unearthed from the Neolithic cultural site in Dadiwan, Qin 'an, Gansu Province, and they were all vividly portrayed. All this shows that the relationship between man and dog was quite clear at that time, and dogs have become close partners of human beings.

In China, dogs have been found since the Neolithic site. For example, the skeleton of a dog dating from 7000 to 6500 years ago was found at Hemudu site in Yuyao County, Zhejiang Province. The first half of the dog's skull and mandible were discovered 7000 years ago at the Cishan site in Wu 'an County, Hebei Province. From the structural point of view, it is undoubtedly a domesticated and mature dog, which is very different from its ancestor-wolf.

The most anticipated thing is that a large number of mammalian fossils were found in Zhoujiayoufang, Yushu County, Jilin Province, China, that is, the Late Pleistocene of Paleolithic Age, about 26,000 BC-0/000 BC. In addition to human fossils, there are also "semi-fossils" of domestic dog skulls. Although some people think it belongs to Pleistocene animal fossils, more experts think it is the remains of Holocene or modern animals. This remains of domestic dogs in the Paleolithic period can show that residents in Northeast China have begun to domesticate dogs. In other words, domestic dogs in Northeast China appeared in the late Paleolithic period, about 1 10,000 years ago. The primitive humans in Northeast China are Tunguska Mongols, so it is reasonable to think that the ancestors of Donghu, Rong, Di and Su Shen domesticated dogs, among which Gou Rong is a famous dog-raising clan.

It can be seen that Northeast China and Mongolia are the centers of domestic dog domestication in the late Paleolithic and early and middle Neolithic. In addition, in Anyang, Henan, Cishan, Hebei, Anbanpo, Xi 'an, Shaanxi, Dawenkou, Shandong, Changzhou, Jiangsu and other places, it can be affirmed that China is one of the centers of domestic dogs.

Looking around the world, archaeological data from other countries also show that dogs have been with human civilization for a long time: in the early village of Jarmu in Iraq, the bones of dogs were found in the ruins from 7000 BC to 6500 BC; The dog in Kaio Nu site was identified as 7000 BC; At about the same time, domestic dogs appeared in Europe, and dogs were also found in the Magrimos cultural layer of the Middle Stone Age in Denmark. In 7500 BC, dogs were also found in the Middle Stone Age site in Stalga, Yorkshire, England. In addition, it has been announced that dog bones from 9500 BC to 8400 BC have been found in caves in Idaho, USA, but there is still controversy in academic circles at present, and it is difficult to draw a conclusion.

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