The ancestor of the monkey is the Asian De's monkey, which lived in the early Eocene 55 million years ago, mainly feeds on insects, and it is also the most primitive species of primates, but its size is much smaller than other primates, weighing only 28 grams, and its eyes are particularly large, and it likes to live near lakes in the jungle.
Monkeys belong to primates, and the earliest primates evolved from insectivores, the earliest primates are the same as modern tree shrews, its snout is particularly prominent, the tail is extremely slender, it looks very similar to modern squirrels, but the tail is relatively thin, lives in trees for a long time, mainly eats some insects and plants, and likes to eat fruits the most.
At the beginning of the Cenozoic, it began to gradually differentiate into more classifications, mainly divided into two evolutionary branches, one is the protomonkey suborder, mainly including lemurs, slow loris, etc., and the other is the ape-like suborder, including humans, apes, modern monkeys and archemorphic monkeys, among which the archemorphic monkeys belong to the most primitive ape-like suborder, and the Asian De's monkey is the oldest one of the archetypal monkeys, so it is also concluded that the De's monkey is the ancestor of the monkey.
The Asian Der's Monkey is the oldest of the 6 clades of the Tak's Monkey family, found in the Hengdong region of Hunan Province, China, and based on scattered teeth and skull fragments, it has very large eye sockets, and has two rows of extremely small teeth, and it has a larger hole under the eye socket of the skull, which also indicates that it has extremely developed tentacles.
As the ancestor of monkeys, the Asian monkey also has similar living habits to modern monkeys, for example, it mainly lives on trees, although it evolved from insectivores, it still eats more plants, but most of them are sweet fruits, and there are not many insects. However, it was not as large as a modern monkey, and its skull was only 2Less than 5 centimeters, it is estimated that its body may be less than 1 meter, and its weight is only 28 grams.
Monkeys are divided into broad-nosed monkeys and narrow-nosed monkeys, broad-nosed monkeys are relatively low, such as squirrel monkeys, howler monkeys, and other monkeys that live in the New World, narrow-nosed monkeys are more evolutionary, such as our common monkeys, macaques, are often pushed up to the lower lemurs, only in Madagascar, and the rest of the world is extinct, and the earliest ancestors of primates were tree shrews, like rats, but living in trees.
The closest to humans are apes: chimpanzees, humans and chimpanzees have a common ancestor is Australopithecus, apes and modern primates other than humans and apes have a common ancestor, protomonkeys, the ancestors of protomonkeys, like other mammals, are a small mammals similar to mice that appeared long before the dinosaurs.
The primate is a taxonomic unit that includes humans, and the reason why it is called primates is because humans regard themselves as the highest product of evolutionary history, believing that humans are at the top of the evolutionary ladder of biology, the chief of all spirits, and the ruler of the world. However, primates originate directly from the primitive insectivorous ancestors, and from the evolutionary tree of mammals as a whole, primates are an earlier branch.
Since the earliest primates evolved from insectivores, they should have similarities with some insectivores. The tree shrew, feather-tailed tree shrew, and their relatives living in Asia today are morphologically quite close to the earliest primates. The tree shrew is a small mammal the size of a squirrel, with its head sticking out forward, its snout long, and its long tail trailing behind it. They are taxonomically insectivorous, but actually have more fruits than insects in their food**.
Morphological and phylotaxonomic analyses have shown that the Asian Derrick's monkey is the most primitive of all the six known species of Derrick's monkey and the oldest primate ever discovered. The Asian Derrick's monkey weighs only about 28 grams, and its head is no more than 2At 5 centimeters, it is not as big as a fist and much smaller than all the primates that live in the world today. It has two rows of tiny teeth and relatively large orbits, and a large infraorbital foramen for the trigeminal nerve to pass through, implying the presence of more developed tentacles. According to the excavated fossils, the Hengyang Basin in Hunan Province in the early Eocene was a huge lake, and the De's monkey lived in the jungle near the lake and fed on insects.
Monkeys, like orangutans and humans, evolved from primitive primates.
Scientists have found through fossils that the earliest primitive primates appeared about 56 million years ago, just a few million years after the extinction of the dinosaurs. This primitive primate was only the size of a squirrel, arboreal and could hop from branch to branch, feeding on plant fruits and insects.
Primitive primates later evolved separately, one to become the modern monkey, and the other to be the common ancestor of present-day humans and apes.
Apeman. 
Through long-term observation and research by biologists and anthropologists, it has been found that humans and apes have extremely similar characteristics in terms of appearance, morphology, anatomy, physiology, and blood biochemistry.
In terms of physical appearance, apes have similar bodies to humans, except that members of the family can stand more upright, while apes are in a semi-vertical position, and their hind limbs can temporarily stand upright, or walk on two legs; Facial ** or hairless, without tail; The position and image of the facial features are extremely similar to those of people; Apes, like humans, have 32 teeth, and the structure of the teeth is roughly similar to that of humans; In terms of body structure, apes have roughly the same type of bones as humans; In terms of basic physiological phenomena, apes and humans are similar in many places, especially the early fetus of apes and human fetuses are very similar; From the perspective of blood biochemistry, apes and humans also have very striking similarities or similarities, both have blood types A, B, O, AB and so on; From the chromosomes of apes, it is proved that the chromosome morphology and position of apes are also similar to those of humans.
Analyze their evolutionary process in terms of brain volume: the brain capacity of the African Australopithecus 3 million years ago was 440 cubic centimeters; The brain volume of a 1 million year-old Homo sapiens was 600-650 cubic centimeters; The brain volume of Homo erectus about 1 million to 1.5 million years ago was 940 cubic centimeters; The corresponding Chinese "Lantian ape man" is about 1 million to 800,000 years old, and its brain capacity is 780 cubic centimeters; The Chinese Hexian ape-man lived about 240,000 to 280,000 years ago, and its brain capacity was 1,025 cubic centimeters, which is similar to that of the Peking Man in Zhoukoudian.
Of course, apes have many essential differences from humans in three aspects: physiological structure, language and sociality, for example, people can make and use tools, people are more able to adapt to the environment, people have memory, curiosity, people can reason rationally and predictably about their own behavior, people can think abstractly, people have self-consciousness and imagination, have fantasies, etc., in short, they are unique to humans in engaging in social labor, making tools, and actively transforming nature.
The structure of the human brain has higher-level, more complex evolutionary characteristics.
The essential difference between humans and apes is that humans have language.
Another important essential difference between humans and apes is the sociality of humans.
The main process of ape evolution** is generally divided into the following two major steps: the first step, the transition from ape to man, has gone through two stages: Ramaucus and Australopithecus.
In the second step, human beings developed to the primitive commune period and became fully human, going through four stages: early Homo erectus, late Homo erectus, early Homo sapiens, and late Homo sapiens.
It is generally believed that labor played a decisive role in the process of ape transformation.
On the question of the origin and evolution of human beings, there is still a lot of debate in the academic circles.
In addition, there are different theories about how modern man originated.
The origin of modern man refers to the race of people who now live in different parts of the world - yellow, white, black and brown people, and there are two theories about how they originated.
One theory, called the "single regional origin theory", holds that modern humans were formed by the "invasion" of early Homo sapiens into the world in a region that was previously thought to be western Asia, but in recent years has been changed to southern Africa.
The other is called the "multi-regional origin theory", which holds that modern humans in Asia, Africa, and Europe evolved from early Homo sapiens and ape man.
As far as the origin of the Chinese is concerned, archaeologists believe that the Chinese evolved from local ancient people on their own land.