East and Southeast Asians descend from the ancient prehistoric East Asian-related hunter gatherers, nomads and agriculturalists, also known as “East-Eurasian” or “Mongoloid” (sometimes also simply known as “Asiatic”).
For a comprehensive summary see: Tao Zhang’s post in Huaxia knowledge
I will write about genetics, historical migration and anthropologic data. Some studies and lastly graphical examples of East Asian-related people.