Buffalo is a typical southern animal, and the live buffalo in China can only live in the south of Huaihe River. So how can we find buffalo fossils on the northeast border far from Huaihe River? Experts have had many speculations about this interesting question. There is a view that buffalo is a southern population, native to India. After entering China from the south, it gradually expanded to the northeast in geological history. Later, due to climate change, buffalo could not adapt to the environment and finally became extinct in the north. The second view is the seasonal migration of animals. It is thought that buffaloes used to migrate in groups. They go to the north in summer and return to the south in winter. The buffalo fossils found in Northeast China and Inner Mongolia all died unexpectedly when they came to the fossil site that summer. The author holds the third view, that is, the king buffalo belongs to a unique cold-resistant local population with mammoths and hairy rhinoceroses common in Northeast China and Inner Mongolia. As we all know, modern elephants and rhinoceroses are warm-loving animals in the south, but in the late Pleistocene, especially during the period from 40,000 years ago to 1 0,000 years ago, there were mammoths and long-haired rhinoceroses in the north, and their fossils have been found in large numbers. Bodies with rubber bands unearthed from frozen soil in Siberia have proved that they are covered with long hair and thick skin, and store a lot of fat under the skin, which can completely adapt to the cold climate in winter in the north, and so can large animals such as rhinoceros. Why is it not possible for a king buffalo as big as a hairy rhinoceros? The reason why the author holds the third view is mainly because when I investigated and excavated Quaternary mammal fossils for many years, I found that many buffalo fossils of Wang were unearthed in the same place and stratum as mammoths and hairy rhinos. Therefore, it is speculated that the buffalo of the Wangs used to be a cold-tolerant animal like the hairy rhinoceros and mammoth, and may also have long hair, but no carcass with meat has been found in the frozen soil.