There are many ancient human relics on the land of China, and many ancient human fossils have been unearthed, such as Xihoudu people, Yuanmou people, Nihewan people, Lantian people, Beijing people, Dingcun people, Maba people, Dali people, Shuidonggou people, Liujiang people, Mountaintop Cave people, etc., of which the Xihoudu people and yuanmou people are the earliest, appearing about 1.8 million years ago, but they are not the ancestors of modern Chinese, the meaning of their existence, can only be said to be more than 1.8 million years ago, there are already ancient humans living in the land of China.
The study of early human inheritance relationships previously mainly relied on archaeological fossil discoveries, but with the development of genetics, scientists can trace the development path of human beings step by step from the human genome, and through the genetic analysis of representative humans around the world, it is found that all humans today, including yellow, white and black races, belong to the modern Homo sapiens race, that is, all human beings have a common ancestor.
Scientists have found that modern Homo sapiens originated in eastern Africa, some of which came out of Africa about 100,000 years ago, and their descendants spread to all parts of the world in different time periods, and our Chinese is also one of the subsequent developments, which is generally believed to be produced by a combination of Mongolian, Malay, Central Asian and native races.
This article mentioned many ancient humans living on the land of our country, but basically only the Liujiang people and the Mountaintop Cave people who are relatively close in time have a blood relationship with our modern Chinese, they all belong to the modern Homo sapiens species, while other ancient humans do not belong to the modern Homo sapiens species, and we do not have any direct genetic inheritance relationship, but they live in the land of our country in different time periods.
The same is true in Western countries, such as Europeans, genetic research only Cromeron and they have a direct genetic inheritance relationship, the famous Neanderthals and Denisovans although they also have genes in their bodies, but these two ancient humans have become extinct, but their existence time and modern Homo sapiens races have intersected, these races have also crossed marriages, so a small number of their genes have been passed down in humans outside Africa.
Regarding the origin and evolution of humans, paleoanthropologists generally believe that the direction of human evolution is Australopithecus ⇒ ⇒ Homo erectus⇒ early Homo sapiens⇒ late Homo sapiens ⇒ modern humans, only modern Homo sapiens species are from Africa, many ancient humans are also from Africa, about 2 million years ago, the first batch of Homo erectus began to go out of Africa, they are roughly the ancestors of many ancient humans on the Eurasian continent.
However, they have all become extinct in the course of time for one reason or another, and today's human beings have a common ancestor 100,000 years ago, they came out of eastern Africa, multiplied generation after generation, and traveled the world step by step, forming a modern human being of as many as 7.6 billion (data from early 2018).